Quote:
Originally Posted by winmutt
It's not worth it for the .13 reduction. Just stick with the 4speeds and be prepared for replacements. None of the diesel trans were torque rated for the turboed diesel. It would make more sense to put a 602 in and leverage the many manual.trans options the 60x gives you.
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This is an interesting point. The 4sp tranny's are cheap and readily available versus the 5sp which are very rare. The OPer's car is an 85' which means it has the one year 2.88 diff which is an excellent start.
------axle ratio- tire diameter- tranny ratio- veh speed- rpm
4sp--- 2.88------- 24.7----------- 1.0---------- 70mph--- 2742
5sp--- 2.88------- 24.7----------- .87---------- 70mph--- 2386
-----------------------------------------------------Difference 356
I never use 5th gear except on freeways, it cruises nicely at 2400 rpm's but 2800 wouldn't be that bad.