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Index > Engine/Drivetrain > Thread: repu diffs and axles??
Thread: repu diffs and axles??
RePu_soljah


1st Gear
Posts: 31
posted July 17, 2003 03:52 PM

repu diffs and axles??

hey i was wondering wat kinda diff they run in the repus?? since it has a rx4 engine i thought they might have used the same runing gear or does it have a differnt ratio??
how strong is the 3spd auto my repu has one and i was just wondering wat they are like?? beening a right hand driver i thought da auto would b sweet az since the truck is left hand.

cheers
____________
If its not a rotor its not a motor!!!!

         
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brad


Rotorhead
Posts: 1671
posted July 17, 2003 05:18 PM

quote:
hey i was wondering wat kinda diff they run in the repus?? since it has a rx4 engine i thought they might have used the same runing gear or does it have a differnt ratio??
how strong is the 3spd auto my repu has one and i was just wondering wat they are like?? beening a right hand driver i thought da auto would b sweet az since the truck is left hand.

cheers


Open diff only, no LSD on REPU. REPU diff is totally different diff than Rx4 and Rx7. Short 4.625 on 74 and 75 model. Got progressively taller up to 3.90 (I think) in 77.

Don't know how strong the auto is, but it should take anything unabusive short of forced induction or bridge/peripheral port.
____________
-brad-
74 REPU Lawn Green
81 Rx-7 racecar. 12a J-
Bridge

       
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Klaus43


Rotorhead
Posts: 1259
posted July 17, 2003 05:54 PM

Lots of those auto.'s

failed around 45K... should be avoidable with preventive maintenance. I hear some like that tranny for drag racing... Rearend ratios differed for manual vs. automatic, and changed over the years as well, at least according to the reference I have:
'74 manual 4.625 , auto. 4.375
'75 " 4.375 , " 4.111
'76 " 4.111
'77 " 3.900

       
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RePu_soljah


1st Gear
Posts: 31
posted July 17, 2003 06:41 PM

auto

sweet az could i use a rx4 auto or even a s4 rx7 box??
az long az it can handle a lil bit of abuse every now and then.

cheers guys

oh yeah could i score a repu workshop manual or owners manual from??
____________
If its not a rotor its not a motor!!!!

         
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brad


Rotorhead
Posts: 1671
posted July 17, 2003 09:40 PM

quote:
sweet az could i use a rx4 auto or even a s4 rx7 box??
az long az it can handle a lil bit of abuse every now and then.

cheers guys

oh yeah could i score a repu workshop manual or owners manual from??


Wasn't there a thread here saying Rx4 auto is same as REPU auto?

79-80 trans works great in REPU, shift lever slides in without any cutting. You need to fab a small metal plate to bolt between rx7 stock trans mount and REPU crossmember. I took pics of mine and will post later when the roll's developed.

S4 shiftlever is way far back, not sure if the bellhousing is too big to fit and all that jazz. see if anyone else here has done it.

REPU Mazda Factory shopmanuals show up on ebay.com sometimes. Start around $25 and usually stay around there. They are rare and very out of print though. Chiltons makes a decent Mazda truck shop manual that does cover REPU, but much more photos and diagrams of B2000/B2200 than REPU. Not bad at all though. 2nd choice.
____________
-brad-
74 REPU Lawn Green
81 Rx-7 racecar. 12a J-
Bridge

       
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