Front Wheel Drive Trans Options And Help

greatinspirational · 09-19-2014, 08:47 PM

I have a broken trans on a DF/S Oldsmobile Delta 88 6 cylinder. Wondering if I should rebuild the original stock 440T4 trans that's in car or if there is a better option. I was told that the TH325 is like the TH200 except for 6 cylinders. Any truth to this ? Is there any place to look up internal rotating mass and trans weight specs for these 6 cylinder options ?

TH425 = 1966 to 1978 (used on Cadillac Eldorado, Oldsmobile Toronado and the GMC motorhomes/transmodes)
TH325 = 1979 to 1981 (used on Cadillac Eldorado and 1980-generation Seville, and the Oldsmobile Toronado and Buick Riviera)
TH325-4L = 1982 to 1985 (see TH325 for usage)
TH125 = 1980 to 1981
TH125C = 1982 to 1986
TH440T4 transaxle = 1985 to 1986 (used with TH125C)

Any gear and convertor advice ? I'm new to the game. Thanks !!

Mike Carr · 09-19-2014, 09:35 PM

I would talk to Owen Quirion. He built some home made parts for his BF/S Grand Am. He is a member on here, I believe under his own name.

jmantle · 09-19-2014, 09:37 PM

Quote:

Originally Posted by greatinspirational

I have a broken trans on a DF/S Oldsmobile Delta 88 6 cylinder. Wondering if I should rebuild the original stock 440T4 trans that's in car or if there is a better option. I was told that the TH325 is like the TH200 except for 6 cylinders. Any truth to this ? Is there any place to look up internal rotating mass and trans weight specs for these 6 cylinder options ?

TH425 = 1966 to 1978 (used on Cadillac Eldorado, Oldsmobile Toronado and the GMC motorhomes/transmodes)
TH325 = 1979 to 1981 (used on Cadillac Eldorado and 1980-generation Seville, and the Oldsmobile Toronado and Buick Riviera)
TH325-4L = 1982 to 1985 (see TH325 for usage)
TH125 = 1980 to 1981
TH125C = 1982 to 1986
TH440T4 transaxle = 1985 to 1986 (used with TH125C)

Any gear and convertor advice ? I'm new to the game. Thanks !!

325 / 325-4L / 425 are all front to back transmissions so they won't work. I would think your best bet would be a properly built 125, should take less power to turn than the 440.

Jim Mantle
V/SA 6632

Mark Yacavone · 09-19-2014, 09:41 PM

First of all , the older FWD V8's are mounted north/south, where the newer FWD engines (80's and newer) are mounted east / west .

Better PM me on this one

ss3011 · 09-19-2014, 11:59 PM

A 4T65-e will have the correct bellhousing, and there are combinations of final drives and sprocket ratio's to get you a decent overall ratio. I think Joel has done a few of these. Joel on Joy . These transmissions are plenty strong !

09-19-2014, 08:47 PM	#1
greatinspirational Junior Member Join Date: Jul 2012 Posts: 74 Likes: 6 Liked 30 Times in 14 Posts	Front Wheel Drive Trans Options And Help I have a broken trans on a DF/S Oldsmobile Delta 88 6 cylinder. Wondering if I should rebuild the original stock 440T4 trans that's in car or if there is a better option. I was told that the TH325 is like the TH200 except for 6 cylinders. Any truth to this ? Is there any place to look up internal rotating mass and trans weight specs for these 6 cylinder options ? TH425 = 1966 to 1978 (used on Cadillac Eldorado, Oldsmobile Toronado and the GMC motorhomes/transmodes) TH325 = 1979 to 1981 (used on Cadillac Eldorado and 1980-generation Seville, and the Oldsmobile Toronado and Buick Riviera) TH325-4L = 1982 to 1985 (see TH325 for usage) TH125 = 1980 to 1981 TH125C = 1982 to 1986 TH440T4 transaxle = 1985 to 1986 (used with TH125C) Any gear and convertor advice ? I'm new to the game. Thanks !!

09-19-2014, 09:35 PM	#2
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	Re: Front Wheel Drive Trans Options And Help I would talk to Owen Quirion. He built some home made parts for his BF/S Grand Am. He is a member on here, I believe under his own name. __________________ Mike Carr, Tri-State S/SS Association President Looking for 2015 S/SS Race Sponsors Contact me if interested buffdaddy_1302@hotmail.com (724) 510-5912

09-19-2014, 09:41 PM	#4
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,816 Likes: 2,906 Liked 5,121 Times in 1,952 Posts	Re: Front Wheel Drive Trans Options And Help First of all , the older FWD V8's are mounted north/south, where the newer FWD engines (80's and newer) are mounted east / west . Better PM me on this one __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

09-19-2014, 11:59 PM	#5
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Front Wheel Drive Trans Options And Help A 4T65-e will have the correct bellhousing, and there are combinations of final drives and sprocket ratio's to get you a decent overall ratio. I think Joel has done a few of these. Joel on Joy . These transmissions are plenty strong !