Is going with an 98+ spec 4.75 fd tranny over just a b16 tranny gearing really worth it?

I saw a chart once and the gears in the itr tranny didnt seem to run out that much quicker than just a stock b16???

So what is everyone opinions on this? Will the 4.75 shave off any significant time of your ET's?????

 

bump cuase i wanna know aswell

 

well, the only way to really test this is to get an itr trans and take out the lsd to make a fair comparison between the two.

unless you install an oem itr lsd to the b16 trans.

 

you'll shave off about .2 seconds, with no other changes. The beauty of Allmotor is that you can build, and always upgrade later if you want. But i know you can change the tranny for any setup...

 

It's definately a worthwhile upgrade, even if drag racing is your forte. If you're financially inclined to do so, consider the ATS over the JDM ITR one though, it makes even more of a difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kendall &raquo;</TD></TR><TR><TD CLASS="quote">It's definately a worthwhile upgrade, even if drag racing is your forte. If you're financially inclined to do so, consider the ATS over the JDM ITR one though, it makes even more of a difference.</TD></TR></TABLE>

yes but the ATS is soooooooo expensive!

I have been thinking of doing this to my GSR tranny though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hatchattack &raquo;</TD></TR><TR><TD CLASS="quote"> Will the 4.75 shave off any significant time of your ET's?????</TD></TR></TABLE>
It helps.

 

I went from a stock GSR tranny, to a B16 tranny, and finally to a B16 tranny with the 4.7FD and OEM LSD, and the difference was very noticeable IMO. Wasn't very fun on a trip from SD to Vegas and back, but I love the set up now.

 

well if you have a GSR tranny do this

get the 4.7 ITR FD and get 2 and 3 gear also
in that way you wil have a JDM ITR SPEC TRANNY

i did that to my GSR also the ITR LSD and the car changed alot.

now i have that same tranny with my modded motor and its even better than before, do it it will pay off

 

if you hardly drive your car on the highway or if you don;t mind being at 6krpm at 80mph then go for it, it accelerates the car really well ... some people use the LS or GSR 5th main and counter gears when installing the final drive. As a matter of fact, I think the JDM ITR with the stock 4.7 fd has a GSR 5th gear ratio.

Greg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bulori &raquo;</TD></TR><TR><TD CLASS="quote">well if you have a GSR tranny do this

get the 4.7 ITR FD and get 2 and 3 gear also
in that way you wil have a JDM ITR SPEC TRANNY

i did that to my GSR also the ITR LSD and the car changed alot.

now i have that same tranny with my modded motor and its even better than before, do it it will pay off</TD></TR></TABLE>

I have been plotting this for a while, but can not find a ITR 2nd and 3rd gear!

The LSD in my GSR should be able used on the with the JDM ITR Ring Gear and Counter shaft?

 

it's worth it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">if you hardly drive your car on the highway or if you don;t mind being at 6krpm at 80mph then go for it


Greg</TD></TR></TABLE>

this is what you need to really consider. that thing will buzz like a chainsaw on the highway. its change of f.d. is noticeable, but, its not too practical. for me that is. city driving, circuit racing & drag . freeway driving for more than 8 minutes on a daily basis . but, if performance is your only concern, then i'd say go for it. i personally think that the b16/itr tranny ratio's with 4.4 is plenty.....unless its a high strung b16 that needs to make up for its small displacement. just my opinion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bulori &raquo;</TD></TR><TR><TD CLASS="quote">well if you have a GSR tranny do this

get the 4.7 ITR FD and get 2 and 3 gear also
in that way you wil have a JDM ITR SPEC TRANNY

i did that to my GSR also the ITR LSD and the car changed alot.

now i have that same tranny with my modded motor and its even better than before, do it it will pay off</TD></TR></TABLE>


Does it matter what year ITR tranny to get these from?

 

not sure about the 2nd/3rd gears, but i know the 98 spec itr tranny had the 4.7 FD and the later models had the 4.4 FD, if that helps

 

jdm = 4.7 FD
usdm = 4.4 FD

 

not quite. the J4D ITR trans has the exact same gearing as the USDM ITR tranny, along with the 4.4 FD. the N3E tranny is the only one with the 4.7 FD, it has the same 1, 2, and 3rd gear ratios as the J4D, but has a GSR 4th and 5th gear to compensate for the higher final drive during freeway driving.

in the 1/4 they're both equal. the N3E car will accellerate faster off the line, but once hitting 4th the shorter gearing of the J4D tranny will quickly catch up. I'm running the J4D tranny in my car because the gear ratios are spaced much more evenly than the N3E tranny. however, i will be switching to the N3E's 4.7 FD when my new setup is done.

J4D=95-97 JDM ITR, 97-01 USDM ITR
N3E=98-01 JDM ITR and Euro spec ITR's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SecretAgent &raquo;</TD></TR><TR><TD CLASS="quote">not quite. the J4D ITR trans has the exact same gearing as the USDM ITR tranny, along with the 4.4 FD. the N3E tranny is the only one with the 4.7 FD, it has the same 1, 2, and 3rd gear ratios as the J4D, but has a GSR 4th and 5th gear to compensate for the higher final drive during freeway driving.

in the 1/4 they're both equal. the N3E car will accellerate faster off the line, but once hitting 4th the shorter gearing of the J4D tranny will quickly catch up. I'm running the J4D tranny in my car because the gear ratios are spaced much more evenly than the N3E tranny. however, i will be switching to the N3E's 4.7 FD when my new setup is done.

J4D=95-97 JDM ITR, 97-01 USDM ITR
N3E=98-01 JDM ITR and Euro spec ITR's</TD></TR></TABLE>

What about this ad, it says it is J4D w/4.7 fd

http://cgi.ebay.com/ebaymotors...33733

Does the seller not know what he's talking about?

 

if you read the description, it says that it has been changed to 4.7 f.d.-the red gasket sealer should be a give away that the case has been opened.

 

i swapped to a JDM FD late in 02 and gained nothing with the swap. i have a USDMITR tranny w/ JDM FD.

 

am i right/wrong in thinkin you need itr 4.7 fd to fit the ek9/dc2 lsd into y21 box ? are there any 4.4 i could use as wanna keep gearin same for those days on the motorway

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hatchattack &raquo;</TD></TR><TR><TD CLASS="quote">4.75</TD></TR></TABLE>Just to be an ***, its a 4.785 FD.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vti444 &raquo;</TD></TR><TR><TD CLASS="quote">am i right/wrong in thinkin you need itr 4.7 fd to fit the ek9/dc2 lsd into y21 box ? are there any 4.4 i could use as wanna keep gearin same for those days on the motorway</TD></TR></TABLE>gsr

 

so gsr has 4.4 that i could use to fit ek9/dc2 lsd straight in mine ?

im in u.k but think our 1.8vti has same box as your gsr, will look into it

thanks

 

Just like the 4.78 swap into a Y21 you will need some other parts beside the FD.