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ZF tranny, should replace with AW71?[700/86] posted by Pete Galambos on
Tuesday, 20 October 1998, at 8:43 p.m.
The ZF4HP22 tranny in my '86 740 just started spewing fluid from
inside the bellhousing (1 pint/mile). Given the reputation this
tranny has, I'm undecided as to whether I should rebuild it
or replace it with an AW71. Has anyone done this swap?
Other than tranny, shifter and OD wiring, what else is needed?
Crossmember, driveshaft, ...? Also, what models/years will
interchange (240, 760)? Any opinions welcome...
peterg@synopsys.com
Re: ZF tranny, should replace with AW71?[700/86] posted by George Swift on
Tuesday, 20 October 1998, at 9:46 p.m.
Do the swap. Any AW70 or 71 will work from 82-on. The basic gearbox is the same, but some are better or stronger than others. If you're going to buy one from a junkyard, get one from the latest years possible. (89-93 non turbo, since they have a lock-up converter.) If you use an earlier gearbox, you will need to plug the speedo drive hole in the output shaft housing.
I don't remember if the flex plate is the same or not, you may need that. The driveshaft is different. If you order it from the boneyard, tell them you're doing the conversion. Remember that the car didn't know what transmission it was going to get, so the interchange is ''bolt in.''
I think if you get the necessary parts (with relatively low mileage) for under $1000.00 you did alright.
George Swift / Volvo Car Care / 760 868 1903