Just in case what is the correct auto trans - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigunde** · 12-03-2004, 09:42 AM

what is the correct length automatic trans for a 70 with a big block?Im thinking with a turbo 400.Thanks

ChevyDude · 12-03-2004, 10:38 AM

Turbo 400 seems to be the right choice...but don't you mean what is the correct "DriveShaft" length? I've got a similar issue going on as I have a 350 SBC and am installing a 700r4, which the drive shaft will have to be shortened. I plan on hooking it all up and measuring and then have it cut. Hope this helps.

**bigunde** · 12-03-2004, 11:08 AM

i was thinking what will work with the auto crossmember

chickenwing · 12-03-2004, 11:14 AM

Chevydude, call your driveshaft shop up and ask them how to measure it. I shortened my 2 piece and they wanted from center of carrier bearing to tip of output shaft. Your shop might want differant.

Bigunde, can't say for your xmember question.

**bigunde** · 12-03-2004, 11:28 AM

we use advanced driveline here and they tell me to measure from the end of the tail shaft to the yoke on the rear,but i know people do it different.

ChevyDude · 12-03-2004, 11:41 AM

Thanks Chicken Wing. I have friends at the Drive Shaft shop and they are coming out to the house when the Engine and Tranny are setting in place. They want to measure themselves.

**bigunde** · 12-06-2004, 01:25 PM

i guess what im asking is do i need a long or short shaft tranny to work with a factory automatic crossmember?

neonlarry · 12-06-2004, 01:41 PM

Either. They use the same mount.

**bigunde** · 12-06-2004, 01:49 PM

,its adjustable that much?.i know there is usually a few inches different.

12-03-2004, 09:42 AM	#1
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	Just in case what is the correct auto trans what is the correct length automatic trans for a 70 with a big block?Im thinking with a turbo 400.Thanks

12-03-2004, 10:38 AM	#2
ChevyDude Senior Member Join Date: Jun 2003 Location: Westminster, CO Posts: 3,071	Turbo 400 seems to be the right choice...but don't you mean what is the correct "DriveShaft" length? I've got a similar issue going on as I have a 350 SBC and am installing a 700r4, which the drive shaft will have to be shortened. I plan on hooking it all up and measuring and then have it cut. Hope this helps. __________________ Alex 1971 Lil' Red 350 SBC 700R4

12-03-2004, 11:14 AM	#4
chickenwing Lovin' Life in Miss.! Join Date: Mar 2004 Location: Puckett, Mississippi Posts: 1,937	Chevydude, call your driveshaft shop up and ask them how to measure it. I shortened my 2 piece and they wanted from center of carrier bearing to tip of output shaft. Your shop might want differant. Bigunde, can't say for your xmember question. __________________ The truck... you hear that? No really, you did hear that?!!!

12-03-2004, 11:41 AM	#6
ChevyDude Senior Member Join Date: Jun 2003 Location: Westminster, CO Posts: 3,071	Thanks Chicken Wing. I have friends at the Drive Shaft shop and they are coming out to the house when the Engine and Tranny are setting in place. They want to measure themselves. __________________ Alex 1971 Lil' Red 350 SBC 700R4

12-06-2004, 01:41 PM	#8
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Either. They use the same mount. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

12-03-2004, 11:08 AM	#3
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	i was thinking what will work with the auto crossmember

12-03-2004, 11:28 AM	#5
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	we use advanced driveline here and they tell me to measure from the end of the tail shaft to the yoke on the rear,but i know people do it different.

12-06-2004, 01:25 PM	#7
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	i guess what im asking is do i need a long or short shaft tranny to work with a factory automatic crossmember?

12-06-2004, 01:49 PM	#9
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	,its adjustable that much?.i know there is usually a few inches different.



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