TH350 or 700R4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevykevy · 11-26-2006, 12:06 AM

I have two rears for my 68 project. I have a 6 lug with a 3:73 gear and I have a 5 lug with a 3:07 gear. I have a TH 350 which I would use with the 3:07 for A 3:07 final drive or I can use the 3:73 with the 700R4 and have a similiar final drive. What to do? Any suggestions??

qksilver · 11-26-2006, 12:15 AM

depends on what you want the truck for, I would go with the 700r . The truck would be a better driver

chevykevy · 11-26-2006, 12:24 AM

Thanks, I am going to be using the truck for a weekend cruiser.

skokie · 11-26-2006, 01:21 AM

I have a 400 turbo with a 3.07 and I am looking at doing a swap to a 700r4. However once it is done I am reinstalling my original 3.73. 3.07 to me would be too tall with the 700r4.

krue · 11-26-2006, 01:48 AM

I'm putting a th400 in my truck and swapping the 3.07 gears for 3.73. After I get thru working my truck I'm probably putting a 2004r in it with the 3.73 gears.

Rokcrln · 11-26-2006, 06:01 AM

Well my truck came with 4.10's, Th350 and @ 70mph I would be turning 3600rpm's. Then I put in a 700r4 and 3.43's and it has teh same take off as with the 4.10's (700r4's have a 20% lower first) but now @ 70mph it turns 1800rpm. I think this is the perfect combo for streetability and performance.

Kevin
LFD Inc.

LUV2XCLR8 · 11-26-2006, 09:36 AM

Hmmmmmm, well in my truck at this time I have no idea what I have

**BOSS** · 11-26-2006, 11:22 AM

for a cruiser i would go with the 700r4,but i wouldnt drive it to hard as they dont hold up to good.

Longhorn Man · 11-26-2006, 11:32 AM

I would just build for a little more low end power, and run the Th350 and the 3.07.

Rokcrln · 11-26-2006, 12:21 PM

Quote:

Originally Posted by BOSS

for a cruiser i would go with the 700r4,but i wouldnt drive it to hard as they dont hold up to good.

All depends on how they are built or if you are just running it out of the junk yard. One of the biggest deals with them lasting is running the corect valve body for your power and weight. My trany was built by ATO in Sacramento ($2300)and is guarentied for 700hp out of a small block for 3yrs!

Kevin
LFD Inc.

**BOSS** · 11-26-2006, 12:28 PM

Quote:

Originally Posted by Rokcrln

All depends on how they are built or if you are just running it out of the junk yard. One of the biggest deals with them lasting is running the corect valve body for your power and weight. My trany was built by ATO in Sacramento ($2300)and is guarentied for 700hp out of a small block for 3yrs!

Kevin
LFD Inc.

I agree with you as you said yours was built for it but i was thinking his wasnt and if they are not built to handle the HP they dont hold up very well.

casterbuster · 11-26-2006, 12:38 PM

Not meaning to highjack, but has anyone heard of Phoenix Transmissions out of Weatherford, TX. Here is the link, they seem pretty reasonable. The owner quoted $875 to rebuild my th400 for their level 2 performance.

http://www.phoenixtrans.com/

11-26-2006, 12:06 AM	#1
chevykevy Registered User Join Date: Jan 2004 Location: Wyoming Posts: 641	TH350 or 700R4 I have two rears for my 68 project. I have a 6 lug with a 3:73 gear and I have a 5 lug with a 3:07 gear. I have a TH 350 which I would use with the 3:07 for A 3:07 final drive or I can use the 3:73 with the 700R4 and have a similiar final drive. What to do? Any suggestions??

11-26-2006, 12:15 AM	#2
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: TH350 or 700R4 depends on what you want the truck for, I would go with the 700r . The truck would be a better driver

11-26-2006, 12:24 AM	#3
chevykevy Registered User Join Date: Jan 2004 Location: Wyoming Posts: 641	Re: TH350 or 700R4 Thanks, I am going to be using the truck for a weekend cruiser.

11-26-2006, 01:21 AM	#4
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,334	Re: TH350 or 700R4 I have a 400 turbo with a 3.07 and I am looking at doing a swap to a 700r4. However once it is done I am reinstalling my original 3.73. 3.07 to me would be too tall with the 700r4. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

11-26-2006, 01:48 AM	#5
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: TH350 or 700R4 I'm putting a th400 in my truck and swapping the 3.07 gears for 3.73. After I get thru working my truck I'm probably putting a 2004r in it with the 3.73 gears. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

11-26-2006, 06:01 AM	#6
Rokcrln Senior Member Join Date: Jul 2005 Location: Winters Ca. 95694 Posts: 4,843	Re: TH350 or 700R4 Well my truck came with 4.10's, Th350 and @ 70mph I would be turning 3600rpm's. Then I put in a 700r4 and 3.43's and it has teh same take off as with the 4.10's (700r4's have a 20% lower first) but now @ 70mph it turns 1800rpm. I think this is the perfect combo for streetability and performance. Kevin LFD Inc.

11-26-2006, 09:36 AM	#7
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,477	Re: TH350 or 700R4 Hmmmmmm, well in my truck at this time I have no idea what I have __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

11-26-2006, 11:22 AM	#8
BOSS Just here to help Join Date: Jan 2002 Location: Norwood,Mo Posts: 3,893	Re: TH350 or 700R4 for a cruiser i would go with the 700r4,but i wouldnt drive it to hard as they dont hold up to good. __________________ Support our site Norwood Survivor

11-26-2006, 11:32 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: TH350 or 700R4 I would just build for a little more low end power, and run the Th350 and the 3.07.

11-26-2006, 12:38 PM	#12
casterbuster Mejor Que Nada Join Date: Jun 2006 Location: texas Posts: 232	Re: TH350 or 700R4 Not meaning to highjack, but has anyone heard of Phoenix Transmissions out of Weatherford, TX. Here is the link, they seem pretty reasonable. The owner quoted $875 to rebuild my th400 for their level 2 performance. http://www.phoenixtrans.com/ __________________ The only thing that separates "Dreams" from "Reality" is TIME and MONEY!!!



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