3:42 Gears and a 700r4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JMac11 · 11-07-2008, 05:29 PM

My 84 has a 700r4 with either 2:73 or even worse 2:41, I can pickup a set of 3:42's cheap, are they worth it?

*FormerMember* · 11-07-2008, 05:53 PM

Quote:

Originally Posted by JMac11

My 84 has a 700r4 with either 2:73 or even worse 2:41, I can pickup a set of 3:42's cheap, are they worth it?

What size tires?

I'd say a bigger jump is required, if you have anything more than a 33" tire. What's the intended use of the truck?

I like 3.73's, 33" and a 700R4... even then, you may be lugging the motor a bit.

JMac11 · 11-07-2008, 06:00 PM

My bad on the info.... Want to go to 33's, engine is a copy of the summet 350 horse 350 with Trick Flow heads. This is strictly a mall crawler, daily driver.

**kwmech** · 11-07-2008, 06:28 PM

With a 33'' tall tire, you could go as deep as a 4.56 ratio. In overdrive the 4.56 will become a 3.28

LUV2XCLR8 · 11-07-2008, 07:29 PM

The 700R4/3.42 combo came std for many years in the late 80's
and early 90's Corvettes. So yeh it makes for a good combo

(That is my current set-up on the C5 build that I am working on)

*FormerMember* · 11-07-2008, 08:36 PM

Quote:

Originally Posted by LUV2XCLR8

The 700R4/3.42 combo came std for many years in the late 80's
and early 90's Corvettes. So yeh it makes for a good combo

(That is my current set-up on the C5 build that I am working on)

Yep, with a smaller than 33" tire.

I would go 3.73 or 4.10

drbyrdman · 11-07-2008, 09:03 PM

i have 410 with my 700r tranny and love it. great combo

**special-K** · 11-07-2008, 09:04 PM

Yo`ll be good in Florida,I`d think.I like this combo in a 2wd with shorter tires.I consider 3.42s to be the tallest gear I`d want with o/d.I feel from 3.08s and on are as good as o/d.

Pyrotechnic · 11-08-2008, 02:33 AM

Well I'm from the 2WD camp and I'd consider 3.42's and a 28" tall tire a good combo for a 700R4. That's with 28" tall tires though.

With 33's I would run at least 4.10's.

**special-K** · 11-08-2008, 09:09 AM

Why not 3.73s?I had a`90 Blazer with 3.08s and 12.50/33s.It was a manual 4spd and was a borderline high.Granny seemed almost high enough to use and sometimes I did.Not nearly as short as any other truck I`ve had.It rolled down the hiway like I had o/d.I wouldn`t want o/d with that combo and don`t see a need.I believe you`d be in & out alot.An automatic would be worse.
I never played off road with that rig.It was the family car.

11-07-2008, 05:29 PM	#1
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	3:42 Gears and a 700r4 My 84 has a 700r4 with either 2:73 or even worse 2:41, I can pickup a set of 3:42's cheap, are they worth it?

11-07-2008, 06:00 PM	#3
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: 3:42 Gears and a 700r4 My bad on the info.... Want to go to 33's, engine is a copy of the summet 350 horse 350 with Trick Flow heads. This is strictly a mall crawler, daily driver.

11-07-2008, 06:28 PM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,630	Re: 3:42 Gears and a 700r4 With a 33'' tall tire, you could go as deep as a 4.56 ratio. In overdrive the 4.56 will become a 3.28

11-07-2008, 07:29 PM	#5
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	Re: 3:42 Gears and a 700r4 The 700R4/3.42 combo came std for many years in the late 80's and early 90's Corvettes. So yeh it makes for a good combo (That is my current set-up on the C5 build that I am working on) __________________ 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

11-07-2008, 09:03 PM	#7
drbyrdman Registered User Join Date: Feb 2006 Location: San Diego Posts: 631	Re: 3:42 Gears and a 700r4 i have 410 with my 700r tranny and love it. great combo

11-07-2008, 09:04 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 3:42 Gears and a 700r4 Yo`ll be good in Florida,I`d think.I like this combo in a 2wd with shorter tires.I consider 3.42s to be the tallest gear I`d want with o/d.I feel from 3.08s and on are as good as o/d. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-08-2008, 02:33 AM	#9
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: 3:42 Gears and a 700r4 Well I'm from the 2WD camp and I'd consider 3.42's and a 28" tall tire a good combo for a 700R4. That's with 28" tall tires though. With 33's I would run at least 4.10's. __________________ 1977 GMC Sierra Grande

11-08-2008, 09:09 AM	#10
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 3:42 Gears and a 700r4 Why not 3.73s?I had a`90 Blazer with 3.08s and 12.50/33s.It was a manual 4spd and was a borderline high.Granny seemed almost high enough to use and sometimes I did.Not nearly as short as any other truck I`ve had.It rolled down the hiway like I had o/d.I wouldn`t want o/d with that combo and don`t see a need.I believe you`d be in & out alot.An automatic would be worse. I never played off road with that rig.It was the family car. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

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