Overdrive Transmission - The 1947 - Present Chevrolet & GMC Truck Message Board Network

treefrog · 08-18-2002, 11:35 AM

I'm running a 70 411 rear, and have 3 choices. Change the rear, go to overdrive, or get a part-time job to pay the gas. What tranny will swap with the least amount of effort? TF

slam33 · 08-18-2002, 11:40 AM

what tranny is in it now ?

treefrog · 08-18-2002, 11:53 AM

It has the old hydromatic 3 speed.

72 super 350 · 08-18-2002, 12:17 PM

I also have a '72 Heavy Chevy and i have the 3 speed hydro with the 4.11's. I get about 10 to 11 with my 350. I do a LOT of pulling with mine, but i still need to get a little better gas millage. 15 would be great!

thanks

**Tim Christian** · 08-18-2002, 02:15 PM

Treefrog does your trans have a 6in or 9in tailshaft?

treefrog · 08-18-2002, 04:52 PM

The tranny has a 6" tailpiece. That's measured from oil leak to oil leak. TF

**Tim Christian** · 08-18-2002, 05:27 PM

In order to change to a over drive you would need to modify the drive shaft. I will do some measuring and get back with you.

Longhorn Man · 08-18-2002, 08:43 PM

Quote:

Originally posted by treefrog
That's measured from oil leak to oil leak. TF

You been layin under my truck again? lol

*big71* · 08-18-2002, 09:01 PM

700r4 is a pice of crap in my opeion one just left me on side of road today

08-18-2002, 11:35 AM	#1
treefrog Registered User Join Date: May 2002 Location: Knoxville, TN USA Posts: 189	Overdrive Transmission I'm running a 70 411 rear, and have 3 choices. Change the rear, go to overdrive, or get a part-time job to pay the gas. What tranny will swap with the least amount of effort? TF

08-18-2002, 11:40 AM	#2
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	what tranny is in it now ? __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>

08-18-2002, 12:17 PM	#4
72 super 350 Registered User Join Date: Jun 2001 Location: Pantego, NC, USA Posts: 47	I'm in the same position I also have a '72 Heavy Chevy and i have the 3 speed hydro with the 4.11's. I get about 10 to 11 with my 350. I do a LOT of pulling with mine, but i still need to get a little better gas millage. 15 would be great! thanks __________________ 78 Chrysler Cordoba Race Car 360 CI. B-Bomber 96 Jeep Grand Cherokee 72 Super with 350. In process of rebuilding. any tips welcomed

08-18-2002, 11:53 AM	#3
treefrog Registered User Join Date: May 2002 Location: Knoxville, TN USA Posts: 189	It has the old hydromatic 3 speed.

08-18-2002, 02:15 PM	#5
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,388	Treefrog does your trans have a 6in or 9in tailshaft?

08-18-2002, 04:52 PM	#6
treefrog Registered User Join Date: May 2002 Location: Knoxville, TN USA Posts: 189	The tranny has a 6" tailpiece. That's measured from oil leak to oil leak. TF

08-18-2002, 05:27 PM	#7
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,388	In order to change to a over drive you would need to modify the drive shaft. I will do some measuring and get back with you.

08-18-2002, 09:01 PM	#9
big71 Account Suspended Join Date: Nov 2001 Location: JONESVILL NC Posts: 1,303	700r4 is a pice of crap in my opeion one just left me on side of road today



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