3:73's and speedo help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

heathbirkendahl · 04-27-2013, 01:39 PM

What's everyone doing when the go 3:73's with a Turbo 350 trans?

**70CHEVYBB** · 04-27-2013, 02:01 PM

I know what i'm doing ------ lots of burn outs

heathbirkendahl · 04-27-2013, 02:05 PM

Quote:

Originally Posted by 70CHEVYBB

I know what i'm doing ------ lots of burn outs

HELL YEAH!!!!

I just want to know how fast the tires are burning. LOL

Did you do anything to yours?

SS Tim · 04-27-2013, 02:36 PM

Since you didn't give a tire size you get to work the problem.

Here are the factory charts for a 71 TH350 V-8 application with 3.73 tires.
You will need to determine which of the these tire sizes is closest to your current tires size.

Then you can try and match up drive and driven gears to your existing parts. The tooth counts alone should help you find what you are looking for. ID what you have first. Replace the adapter seal too.

Remember the drive gear is on the trans. output shaft and behind the output shaft yoke seal inside the tailhousing. This is not a exactly a backyard replacement.

The driven gear rides in the adapter and engages both the drive gear and the speedo cable. This is an easy change within limits.

Finally here is a site that should help with parts if the dealer or local trans shops can't.
http://www.transmissioncenter.net/sp...n_______va.htm

heathbirkendahl · 04-27-2013, 02:41 PM

Quote:

Originally Posted by SS Tim

Since you didn't give a tire size you get to work the problem.

Here are the factory charts for a 71 TH350 V-8 application with 3.73 tires.
You will need to determine which of the these tire sizes is closest to your current tires size.

Then you can try and match up drive and driven gears to your existing parts. The tooth counts alone should help you find what you are looking for. ID what you have first. Replace the adapter seal too.

Remember the drive gear is on the trans. output shaft and behind the output shaft yoke seal inside the tailhousing. This is not a exactly a backyard replacement.

The driven gear rides in the adapter and engages both the drive gear and the speedo cable. This is an easy change within limits.

Finally here is a site that should help with parts if the dealer or local trans shops can't.
http://www.transmissioncenter.net/sp...n_______va.htm

Thank you!

bruceman1968 · 04-27-2013, 03:30 PM

Great link Tim! Thanks for posting it.

04-27-2013, 01:39 PM	#1
heathbirkendahl Registered User Join Date: Jul 2012 Location: Campbell, CA Posts: 452	3:73's and speedo help What's everyone doing when the go 3:73's with a Turbo 350 trans? __________________ 1971 C/10 - Orange & White 2009 GMC 1500 - Lowered 3/4 22' KMC Slides

04-27-2013, 02:01 PM	#2
70CHEVYBB Senior Member Join Date: Feb 2012 Location: chillicothe, illinois Posts: 690	Re: 3:73's and speedo help I know what i'm doing ------ lots of burn outs

04-27-2013, 02:36 PM	#4
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: 3:73's and speedo help Since you didn't give a tire size you get to work the problem. Here are the factory charts for a 71 TH350 V-8 application with 3.73 tires. You will need to determine which of the these tire sizes is closest to your current tires size. Then you can try and match up drive and driven gears to your existing parts. The tooth counts alone should help you find what you are looking for. ID what you have first. Replace the adapter seal too. Remember the drive gear is on the trans. output shaft and behind the output shaft yoke seal inside the tailhousing. This is not a exactly a backyard replacement. The driven gear rides in the adapter and engages both the drive gear and the speedo cable. This is an easy change within limits. Finally here is a site that should help with parts if the dealer or local trans shops can't. http://www.transmissioncenter.net/sp...n_______va.htm Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

04-27-2013, 03:30 PM	#6
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: 3:73's and speedo help Great link Tim! Thanks for posting it. __________________ CHEVY/GMC VIN DECODERS



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