Quote:
Originally Posted by e39_touring
In the US, the 3.91 ratio was only used on the 4.6 and 4.8is and is harder to find. 3.0s all had 4.10 ratio. If still legible, the ratio will be printed on the sticker on top. Mechanically, they all boot in the same.
It may be easier to upgrade to 4.10s front and rear from a manual 3.0.
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Thank you. I European ebay I can see several diffs that are claimed to be 3.91 and "will fit 3.0d auto & 4.8is Auto"
What we want to do is (if we can be sure we are getting the correct ratio? is this:
Order up a 3.91 diff and get it sent over to me.
Replace the entire diff & shafts in one day.
If we strip the old diff down first, it may not buy us anything. We are not sure what holds the planet gears, in place, inside the diff.
The planet gear(s) have dropped, stopping the shafts from being re-installed. We believe they would be held up inside the diff by a bracket that has broken? But have no idea. I have never seen the innards of one of these diffs?
Can anybody see or, tell me, what holds the planet gears in place inside the diff. If we can fix that? we save the hassle of replacing the diff.....
02-10-2019, 06:27 AM
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