Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside*
09-30-2006, 04:05 PM
#26
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Re: (CGags13)
slightly bringing back from the dead, i too have wondered if itd be possible to have custom clutches made to replace the stock ones within the atts unit. atts must obv be better if it was used instead of an lsd in the type-s.
09-30-2006, 08:25 PM
#27
somehow you idiots have bumped this thread since like 2004....ehhh
im sure you could get custom clutches made, and that would be awesome, but not only does it really limit the amount of modifying you can do...the stock ecu isn't up for a whole lot....
im sure you could get custom clutches made, and that would be awesome, but not only does it really limit the amount of modifying you can do...the stock ecu isn't up for a whole lot....
09-30-2006, 08:29 PM
#28
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Re: (bb4ever)
i wish i would have found this last night. i just tried change a clutch in a SH. but after realizing i would have to remove the ATTS, i said @#$% it.
clutch is not that bad yet.
clutch is not that bad yet.
10-15-2006, 05:36 AM
#30
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Re:
I'm in the middle of changing a clutch on my SH, and dug up this post as a reference . . .
Wanted to make a couple quick corrections - in the first picture, the "driver's side" arrow is actually pointing at the passenger's side.
Also, there's a 5th bolt that needs to come off in order to pull the unit - it's a 12mm bolt that goes into the black bracket, you can see the bracket in the last picture, just above the top right bolt hole.
And does anyone have any tips on disconnecting the wiring sub-harness? I've disconnected the bracket it's mounted on from the ATTS unit, but for the life of me can't get it to separate . . . you need hands like a carnie to get at the stupid thing.
Wanted to make a couple quick corrections - in the first picture, the "driver's side" arrow is actually pointing at the passenger's side.
Also, there's a 5th bolt that needs to come off in order to pull the unit - it's a 12mm bolt that goes into the black bracket, you can see the bracket in the last picture, just above the top right bolt hole.
And does anyone have any tips on disconnecting the wiring sub-harness? I've disconnected the bracket it's mounted on from the ATTS unit, but for the life of me can't get it to separate . . . you need hands like a carnie to get at the stupid thing.
11-30-2006, 10:35 AM
#31
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Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fabric
I guess posting this here kind of gets this info into the faq. This thread has to do with mounting standard or base transmissions onto an SH or atts block:
https://honda-tech.com/zerothread?id=760082
An adapter plate or some kind of custom fab needs to me made to allow the intermediate shaft to replace the atts unit.
Some keywords for searching:
Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fabrication fabricated modified
https://honda-tech.com/zerothread?id=760082
An adapter plate or some kind of custom fab needs to me made to allow the intermediate shaft to replace the atts unit.
Some keywords for searching:
Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fabrication fabricated modified
11-30-2006, 11:20 AM
#32
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Re: Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fa
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flyrod »</TD></TR><TR><TD CLASS="quote">I guess posting this here kind of gets this info into the faq. This thread has to do with mounting standard or base transmissions onto an SH or atts block:
https://honda-tech.com/zerothread?id=760082
An adapter plate or some kind of custom fab needs to me made to allow the intermediate shaft to replace the atts unit.
Some keywords for searching:
Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fabrication fabricated modified
</TD></TR></TABLE>
Wow, brought back from the dead again
Yea, a base tranny does bolt up to an SH block, cause I had this done with my first Prelude. I could never find this thread about the plate again. Every time I see a thread asking if a Base tranny works on an SH block, I always think of that custom plate, but can never find the thread....Good find
https://honda-tech.com/zerothread?id=760082
An adapter plate or some kind of custom fab needs to me made to allow the intermediate shaft to replace the atts unit.
Some keywords for searching:
Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fabrication fabricated modified
</TD></TR></TABLE>
Wow, brought back from the dead again
Yea, a base tranny does bolt up to an SH block, cause I had this done with my first Prelude. I could never find this thread about the plate again. Every time I see a thread asking if a Base tranny works on an SH block, I always think of that custom plate, but can never find the thread....Good find
11-30-2006, 12:02 PM
#33
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Re: Type SH Base atts intermediate shaft adapter plate transmission ATTS TypeSH manual FAQ custom fa
if you have more than 250whp, can you actually disable the ATTS, so it can run more than 250whp without any slipping?
so there's no aftermarket upgrade on the atts clutch yet? other than going to a custom shop?
so there's no aftermarket upgrade on the atts clutch yet? other than going to a custom shop?
01-10-2007, 12:19 AM
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Re: (CGags13)
hi i rescently bought a wrecked h22a4 type sh and im trying to drop this in my 92prelude Si 4ws what problems am i going to run into i have the whole car so if theres any extra parts i need i think i can get them from the 5th gen so i can put it in my 4th will the motor mount fit is there any customizing needed please help.
02-01-2007, 01:26 PM
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Re: (skylude23)
I got an idea lets just trade motors, i have a nice jdm h22a longblock that will drop right in your car and you have a nice h22a4 SH motor that will drop right in my car. Easy swaps and everyones happy lol. No but seriously I need an SH motor to replace my current(blown up) motor and they are really hard to find
02-01-2007, 01:28 PM
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Re: (JDM^5thGen)
If you would be interested in parting with that motor I will work something out with you. I'm desperate cause I bought the h22a and didnt realize my tranny wont bolt up to it and im not about to use these ghetto adapter plates everyones talkin about.
02-01-2007, 01:57 PM
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I'll add that you cannot upgrade the ATTS unit, as it has a separate OBDII ecu that cannot be reprogrammed, and its coding has never been cracked so there's no options for a piggyback. Replacing or modifying any part of the ATTS unit would cause its ecu to throw a code and disable the unit.
Also, there are few options for actually upgrading the power output of an SH. While the unit itself can supposedly take 250whp before it shuts off, the ATTS's ecu will only work with the powertrain ecu's designed for ATTS Preludes. This means, of course, that an OBDI conversion is outta the question, forcing you to use a piggyback. As far as any ATTS-friendly modifications, check out this thread I posted over on PreludePower.
http://preludepower.com/forums...54008
Also, there are few options for actually upgrading the power output of an SH. While the unit itself can supposedly take 250whp before it shuts off, the ATTS's ecu will only work with the powertrain ecu's designed for ATTS Preludes. This means, of course, that an OBDI conversion is outta the question, forcing you to use a piggyback. As far as any ATTS-friendly modifications, check out this thread I posted over on PreludePower.
http://preludepower.com/forums...54008
05-16-2007, 08:55 PM
#38
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside* (shivic)
so can i bolt a base tranny to a sh block and swap all that in my base model??
07-06-2007, 07:52 PM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside* (Shakes)
Hey im new to this (iv only owned my prelude for 4 months), is it possible/practical to install an ATTS unit on a non-atts motor? I live in Australia so ATTS preludes are very rare. Is it just a bolt-on electronic unit?
Thanks.
Thanks.
07-06-2007, 08:35 PM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside* (Comrade Ilya)
No, it involves many sensors placed throughout the car including a SH specific ECU. You're better off getting a LSD.
06-29-2012, 12:09 AM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside*
can any tell me exactly what and how to swap the parts over from sh to the base
06-04-2014, 07:50 AM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside*
okay... my question is i have a sh prelude tuned on obd1 so the atts doesn't work. what transmission should i swap in there? would a f20b with factory lsd be good... after looking at this thread i don't know if i can bolt it up because of the difference in the block..... if any of you sh guys have delt with this plz. take a min. or two and tell me....do the adapter plates still work for the sh model? thank you
05-30-2017, 10:07 PM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside*
So it will be possible to swap tranny type sh out to a base modle prelude? Hooking up wires in correct form ot it wouldn't handle it?
05-31-2017, 03:50 AM
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02-16-2019, 11:31 AM
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Re: Type SH and Base comparison. Why the SH needs its own block code. *Pics Inside*
There is a lot more to the SH engine then many of us thought. Unless you have actually attempted changing an SH to a base then sit down and read as I go over the differences I noticed.
Obviously the largest difference is the lack of ATTS on the Base block. For those of you that do not know what the ATTS unit looks like here it is. ATTS is an electronically controlled differential utilizing a double clutch method. The ATTS unit uses ATF and can withstand apx 250 whp before the clutches begin to slip.
Notice the differences.
Now I would like to show the differences between the BASE and SH blocks. To start with here is a picture of the Base block.
Compare that to the block of the SH.
The problems that I noticed were things such as the water pipe, the wiring harness, adapter plate locations, etc.
The wiring harness as far as I can tell now isn't too bad. The plastic covering had to come off and the tape had to be cut to allow more movement of sensor wires, but other then that its not too bad.
The water pipe is completely different. The hose from the SH will bolt onto the base and work, but its a VERY TIGHT fit. I would suggest switching water pipes if you can.
This isn't even getting into the internal differences, the interior differences, suspension, etc.
All in all, if you want to swap an SH for a base, be ready. Its a chore that's for sure.
As always, if you have more info please e-mail me and I will get it added / amended.
Special thanks go out to Mike for the base block pics and a MAJOR thanks to Eddie (PapaPark), Sam and Jussin for helping with the swap / driving to VA from NC to get my lame ***.
Obviously the largest difference is the lack of ATTS on the Base block. For those of you that do not know what the ATTS unit looks like here it is. ATTS is an electronically controlled differential utilizing a double clutch method. The ATTS unit uses ATF and can withstand apx 250 whp before the clutches begin to slip.
Notice the differences.
Now I would like to show the differences between the BASE and SH blocks. To start with here is a picture of the Base block.
Compare that to the block of the SH.
The problems that I noticed were things such as the water pipe, the wiring harness, adapter plate locations, etc.
The wiring harness as far as I can tell now isn't too bad. The plastic covering had to come off and the tape had to be cut to allow more movement of sensor wires, but other then that its not too bad.
The water pipe is completely different. The hose from the SH will bolt onto the base and work, but its a VERY TIGHT fit. I would suggest switching water pipes if you can.
This isn't even getting into the internal differences, the interior differences, suspension, etc.
All in all, if you want to swap an SH for a base, be ready. Its a chore that's for sure.
As always, if you have more info please e-mail me and I will get it added / amended.
Special thanks go out to Mike for the base block pics and a MAJOR thanks to Eddie (PapaPark), Sam and Jussin for helping with the swap / driving to VA from NC to get my lame ***.
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