Si tranny- 35mm or 40mm?
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Honda-Tech Member
Joined: Jun 2004
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From: Northern.IL, IL, United States
I have a 91 Si tranny and am confused if it has 35mm or 40mm bearings for a LSD.
On sites selling quaife LSD they state 88-89 SI 40mm and 90-91 SI 35mm.
I did some searching and someone said that quaife was wrong and all SI trannies had 40mm and the hf dx trannies had 35mm.
Anyone clear this up for me?
I am looking to buy a used one that is in a 95 d tranny and need to know if it will fit in my 91 SI tranny
On sites selling quaife LSD they state 88-89 SI 40mm and 90-91 SI 35mm.
I did some searching and someone said that quaife was wrong and all SI trannies had 40mm and the hf dx trannies had 35mm.
Anyone clear this up for me?
I am looking to buy a used one that is in a 95 d tranny and need to know if it will fit in my 91 SI tranny
Quaife is correct - 88-89 Si has 40mm differential bearings - all the rest, 88-91 DX, 88-91 HF and 90-91 Si have the 35mm differential bearings
I had the exact same issue when I was ordering my Quaife. All the '91 Si trannies I have ever seen have been 40mm. Perhaps the Canadian ones all got 40mm and the US ones were 35mm? I don't know the answer, best thing to do is pop and axle out and physically measure the bearing with calipers (that's what I did to be sure).
Thread Starter
Honda-Tech Member
Joined: Jun 2004
Posts: 2,401
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From: Northern.IL, IL, United States
i tried to measure the bearing but i wasn't sure what to measure. the axle seal was in the way and i couldn't get it off. I don't know what the bearing looks like.
i am a noob with transmissions.
i am a noob with transmissions.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx »</TD></TR><TR><TD CLASS="quote">Quaife is correct - 88-89 Si has 40mm differential bearings - all the rest, 88-91 DX, 88-91 HF and 90-91 Si have the 35mm differential bearings </TD></TR></TABLE>
this information seems a bit contradictory to what ive read.
but i dunno. im not the expert.
this information seems a bit contradictory to what ive read.
but i dunno. im not the expert.
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicflow »</TD></TR><TR><TD CLASS="quote">anyone tell me what to measure to know what size bearing I have for the differential?</TD></TR></TABLE>the bearing looks like a donut - the 88-89 bearings are 80mm diameter on the outside with a 40mm diameter hole where it fits onto the differential carrier - the others are 72mm outside diameter with a 35mm hole -
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