ElPiloto
New member
- Joined
- Jan 7, 2004
- Location
- Southern Arizona
When did 240s and 740s go to 1031 rear axles? Is there an easy way to tell one from a 1030?
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It turns out the 85 740 manual trans (M47) has a 3.31.. The gears out of the 242t automatic we have are 3.91 In doing the math we've realized that we need a 3.73 set... But now we have only 3 day left.
Part #1216159 is a 240 rear axle with 3.15 gears. It's only listed in the '79-'84 parts catalog and it's definitely a 1031.
The tone ring is shown in the '79-'84 240 parts catalog with a note that says it's for vehicles with a shift indicator. 240's didn't get electronic speedos until '86.
isn't there aftermarket gears available for this diff? is there only the factory cogs?
Id guess from a diesel. Dont think that R&P ratio made it to the states.
Based on the 48 tooth speedo ring, its definitely a 90+ car. Probably a 1031, but maybe not. Measuring the pinion and bearings would easily tell.