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Guest Message by DevFuse
 

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So I swapped out the old 5spd in my '84 hardtop in favor of a junkyard replacement...


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5 replies to this topic

#1 Subaru_dude

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Posted 15 December 2013 - 02:22 PM

And now it's a 4 speed. Just great. What rpms should I expect to run on the interstate? This car will be seeing alot of 70mph...


Edited by Subaru_dude, 15 December 2013 - 02:24 PM.


#2 Idasho

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Posted 15 December 2013 - 07:44 PM

I believe the gear ration of 4th gear int he 4-speed is actually a touch taller than 5th gear int eh 5-speed.

 

That means your RPMs should be slightly lower at speed with the 4-speed than the 5-speed.



#3 81EA81

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Posted 15 December 2013 - 08:09 PM

That really depends on tire size,and what year of car the transmission came from. It may only apply to 4x4 tranmissions, but I believe the earlier 80-82 4 speeds had lower gearing.

 

I know there is a transmission gearing table floating around here somewhere. I can take a guess and say you will be running around 3,500-4000rpm


Edited by 81EA81, 15 December 2013 - 08:10 PM.


#4 Subaru_dude

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Posted 15 December 2013 - 08:09 PM

Just took it for a ride on the interstate. It's geared exactly like a five speed... without fifth gear. Which totally sucks because I work an hour and a half away.... NOT FUN.



#5 SmashedGlass

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Posted 15 December 2013 - 08:45 PM

....grab the rear diff out of the same shell you got the xmsn from, perhaps?



#6 Subaru_dude

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Posted 15 December 2013 - 08:47 PM

Sorry forgot to mention this is a 2wd.






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