Trigger84

My 700R4 is almost kaput. Withing the next few months I'm either gonna have my tranny rebuilt or get a TH-350. What should I do, keeping in mind its a stock LG4 305.

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---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

TomP

If you ever plan on getting a lower rear gear ratio (like 3.73's), the 700r4's overdrive gear would help your engine out a lot! See if you could find a newer 700r4 from a junkyard and have that rebuilt... the newer the 700r4, the more design improvements GM did (input splines, fluid pump vanes, auxiliarly valve body, etc...)


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

five7kid

iTrader: (14)

To get an idea what it would be like driving around with a TH350, put the shifter in "D" and drive around like that for a day. I'm sure you'll go for the TH700 after that.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/94.6 @ 5800' Bandimere.

super83Z

Then take it out on the highway and see how high it revs! Then add a couple hundred more for the TH-350 having a non-lock-up converter! And if you still don't want the 700R-4 then email me and I will probably buy it off you!



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I WOULD RATHER PUSH A CAMARO THAN DRIVE AN IMPORT

1983Z28 350w/ edelbrock performer RPM power package with 64cc aluminum heads, dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, ASCD SS hood, 16" IROC rims.

future mods:
completely done over suspension, black paint with flames, Hurst shifter, dakota digital gauge package, procharger supercharger.

Trigger84

Well, the long and short of what I've heard is that the TH-350 can handle alot more HP, but since I have a 305, horsepower isnt a real concern, and it over revs the engine. The 700R4 is a weaker tranny, but better for streeting. So I guess I'll look for a 700R4 out of a late 80's/early 90's vehicle.

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---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

FastBroker

A properly built TH700 can easily handle twice your engine's output, when properly built. Ask ProBuilt on this forum. He's good and a PROFESSIONAL tranny builder... I have used several TH700's recently in TH350 swaps and am VERY pleased, have not had ONE failure in over 1 year and up to 400hp/400lf-ft in 350cids... Not shabby, I think. and these have all been off-road/street TRUCKS which are heavy SOB's and severe tranny beaters. My own Wrangler is a testament to the TH700. I'll always love the TH350, but MUCh easier to live with 4.11's with a 700R4. Plus, $3.00/gallon coming up shortly...

Trigger84

True about the gas, dang OPEC. I guess I'll either have mine rebuilt with the kit B&M puts out. The overdrive is a nice commodity.

------------------
---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

Dan87IROC-Z

Go with the 700R4 for sure. The TH350s suck IMO. Why would you want a the 350 when you can have a 700 with a deeper 1st gear, plus a nice .70:1 overdrive for high speed crusing? Doesn't make any sence to me.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

Trigger84

I just kept hearing that the 350 was a stronger, longer lasting tranny. I kept hearing horror stories from guys that went through many 700R4's because they are weaker. One guy said he went through five of them before he went to the TH-350, which hasn't given him any problems. But, I dont even have half his horsepower, so Im gonna get my current slushbox rebuilt.

------------------
---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

BigChevy342

if ytour going to get a 3 speed get the 400 not the 350, alot stronger

super83Z

a 700R-4 built properly wouldn't be far behind a TH-350 on the "taking power" scale. It all depends who builds it and how good he is. A variation of the 700R-4 is still being put in the F-bods now it just has a different name and is CC.

------------------
I WOULD RATHER PUSH A CAMARO THAN DRIVE AN IMPORT

1983Z28 350w/ edelbrock performer RPM power package with 64cc aluminum heads, dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, ASCD SS hood, 16" IROC rims.

future mods:
completely done over suspension, black paint with flames, Hurst shifter, dakota digital gauge package, procharger supercharger.

JoelOl75

I don't understand the concensus that a 350 could handle more than the 700r4.

The early (weaker) 700's used 350 sprags while the later 700's used much beefier sprags and roller clutches. Sure they had factory GM 'woops' problems in the start but what gm first idea didn't?

Back when the powerglide was being phased out to the 350, 350's were blowing up all over the place and people were cursing the hell out of them for many years until they figured out all the 'bugs'

Basically a stock powerglide isn't even worth it's weight in cast aluminum, but aftermarket powerglides/parts are a whole different story don't get me wrong.

I'm waiting for the day that the 700 gets some reconition for it's durability and finally aftermarket gear ratio changes will be made available. I mean a true 1/4mi demon should have nicely spaced gear ratios and not the wicked 1st and bog in second crap. And a deeper low .6x's would be real nice for cruisin since with proper rear/trans gear ratios working together to hit hp peak at the trap in 1:1 a deeper overdrive would be great for dual purpose cars...

Performance, efficiency, high-tech, low maintainance is what we{sic} want now. The 700 fills the bill for now. If it's not enough, adapting a 4l80E to a big block is there. 1:1 drive ratio is dead on the street IMO. It's just a waste of money (gas)




[This message has been edited by JoelOl75 (edited May 10, 2001).]