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  View original topic: Converting an irs to swing?? Help
Chickensoup Fri Dec 06, 2019 10:59 am

Hey there,

I have a 66 type 1 transaxle and a 75+ irs type 1 transaxle. Is it possible to swap the R and P from the irs into the swing axle? Or can I put the swing axle differentials in the irs? Or does someone make adapters for the axles them self’s? The goal is to have the lower gears and still have a swing axle Trany.

Thanks

Mal evolent Sat Dec 07, 2019 4:57 am

IRS has 8 ring gear bolts. Swing has 6. so, no.

Chickensoup Sat Dec 07, 2019 8:01 am

ok thank you, so where can i buy different ratio gears for a 61-on up swing? who would you off road guys recommend? its a street car only and the gears dont have to be super string.

thanks

Scott SD Sat Dec 07, 2019 8:16 am

Not quite sure what your objective is. The 66 swing trans has a 4.37 keyed r&p, while the 75 has a 3.88 splined. All of the parts in the 75 box are better, but they are not interchangeable. Any trans builder can assemble a swing box with the gear set that you spec.

mr_bill Mon Dec 09, 2019 2:28 pm

I have a "swing-axle" 4:37 R&P in the TYPE I IRS trans in my 1972 Class 11 pre-runner....trans was done by GARY BERG, here in Orange, CA.



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