darrens
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| posted on 18/6/09 at 02:26 PM |
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3.92 Diff
Hi,
Been awhile but, I currently have a 3.62 LSD fitted which at 70mph is about 2750rpm ish which suits the V8 and car. Problem I have is the bearings in
the diff are now stuffed, cost of getting someone to replace bearings is very expensive, 3.62 Diffs are also very expensive, a mate has a 3.92 LSD
7" not 7.5", which would fit not probs, but I'm concerned about the affect it will have on driving i.e rpm when cruising and wether
such a diff would be too higher ratio for the lazy V8.
Any opinions appreciated.
Regards
Darren
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Xtreme Kermit
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| posted on 18/6/09 at 02:44 PM |
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I would suggest grabbing a copy of the gearcalc program and running the scenarios.
look on locost.info for the download.
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Jenko
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| posted on 18/6/09 at 03:02 PM |
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I prefer the 3.9 ratio...I've swapped recently to a 3.6LSD from a standard 3.9, and miss the shorter gearing.......
I'd go for the 3.9 if possible, you could always swap back.....
Paul.
MY BLOG - http://westfieldv8.blogspot.co.uk/
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mcerd1
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| posted on 18/6/09 at 03:07 PM |
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its would be about 8% higher rpm for any given road speed
(3.92/3.62 = 1.08 = +8%)
so that would be 2977rpm @70mph
3.62 LSD's are the most common ones and should be easy(ish) to find
if you get the 3.92 LSD you could swap it for a 3.62 LSD (I sure someone will want to swap)
or you could just rebuild the one you've got...
(btw - all 3.92 and 3.62 diffs are 7", the 3.91 and 3.64's are 7.5" )
[Edited on 18/6/09 by mcerd1]
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snapper
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| posted on 18/6/09 at 05:40 PM |
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Because the V8 revs out lower than the 4 cylinder engines and has more torque the 3.6 or 3.38 is a better choice.
I have a 3.6 LSD but also want a 3.9 LSD
may be up for a swap or buy your mates 3.9 if you don't have it
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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