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Index > Trucks or Parts WANTED > Thread: WTB: auto trans. for 77repu or WTT: 5spd 77
Thread: WTB: auto trans. for 77repu or WTT: 5spd 77
rotarypwrd


Revvin Up
Posts: 55
posted September 18, 2002 01:01 AM

WTB: auto trans. for 77repu or WTT: 5spd 77

just like the subject states, reply back. rotarypwrd

       
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Uncle-Jim


Revvin Up
Posts: 64
posted September 18, 2002 01:17 PM

Ok, try this out. I have a 76 Cosmo with an automatic. I am certain this is the same unit as the autos that came in the Repu. I know for a fact the 5speeds are the same. When I get home tonite, I'll check the specs and see if the ratios are the same in the auto's.
I'd be willing to trade you straight across, however there are a couple of "catches".
Firstly, I'm not able to pull the tranny right now - probably next spring.
Secondly, while the tranny works and shifts thru all gears, it is leaking oil and ought to be rebuilt.
I realize this might not work for you, but give it some thought and email me back. I'd sure be willing to think about some other options or ideas.

____________
Uncle Jim
72 Rx-2 Show Car; '77 REPU (250K & goin' strong) 2 - '76 Cosmo's

       
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repuguru


Redlining
Posts: 319
posted September 18, 2002 03:52 PM

It is the same unit. The question I have is the length of the drive shaft for the auto REPU?
Who was it that had that book of all the crossoverparts and different part numbers?

       
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Klaus43


Rotorhead
Posts: 1259
posted September 18, 2002 09:34 PM
Edited By: klaus42 on 18 Sep 2002 21:39

Here ya go:

REPUJeff has the crossover book...I have a bunch of part #'s...let me see here...looks like transmission case part #'s are identical for the 5speed for rx3, rx4, and cosmo for 1976...with a different part # for them for 77/78. No mention for the 5speed prior to 76. REPU has a different 5speed tranny case part#, but with no mention of for what years...
Auto. trans. case part# listed as identical for rx3,4,cosmo,REPU for 1975...with a different # for '76-78 for all. A quick scan of some of the other auto. trans particulars reveals internals may differ somewhat from year to year/ model to model--and whether 'early' or 'late' model year... (this may or may not be at all significant).
"Propeller Shaft and Joints":
rx4, '75--175825100A
'76-'77--124325100
'78--885425100
Cosmo, exc--124325100
Auto trans-885425100
REPU '75-'76--185625100A
'77--379025100

Universal Joint:

rx4, cosmo--175789251
REPU --070689251

Seems nothing here listed for 1974...(?!?)...
No further differences listed by this part # smorgasboard... draw yer own conclusions..."when in doubt, measure twice"...
Remember the differeces in driveshafts might not mean they don't mate up fine. Hope this helps!

       
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repuguru


Redlining
Posts: 319
posted September 19, 2002 06:19 AM

Thanks for the info Klaus.
I have 77 I am on the verge of going thru and it doesn't have a drive shaft. I do have one off of an older truck but it seems they are different part numbers? But with the apllication I plan on using it may work?
Who the hell knows till you try?

       
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Klaus43


Rotorhead
Posts: 1259
posted September 19, 2002 08:55 AM

Considering the '77's longer, it would seem to make sense the shaft is longer also... if they all use/d the same transmissions (more or less), I'd think the distance engine to driveshaft would be the same... Nevermind the differences in shafts between REPU vs. rx4, for example...

       
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Uncle-Jim


Revvin Up
Posts: 64
posted September 19, 2002 03:07 PM

Hey Guys,
I had to shorten the stock driveline in my Rx2 when I put the 1980 5 speed in. I took it to a local shop, who (even tho they did diesels and big parts) said, "no problem."
For under a 100 bucks, they shortened it, put in new u joints, and balanced the whole thing.
I think you could make just about any tranny fit in any chassis as long as it would bolt up to the block. And that's the nice thing about Mazda's.
I'm thinkin' also that the part number difference in the various "ribcase" trannys may only be in the gear ratio's.

____________
Uncle Jim
72 Rx-2 Show Car; '77 REPU (250K & goin' strong) 2 - '76 Cosmo's

       
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