CCDV Message Board CCDV Message Board

Go Back   CCDV Message Board > Corvette Discussion > Tech Talk Ask "Slapshot" > C4 Specific Tech Talk

C4 Specific Tech Talk 1984 - 1996


Post New Thread Reply
 
Thread Tools
Old 03-21-08, 12:57 AM   #1
InGaNow
Probationary Member
 
Join Date: Mar 2008
Posts: 3
InGaNow is on a distinguished road
Question Replacement 700R-4 in my 85

Hello from Atlanta....former member from Mt. Laurel, NJ. I just took a ride with the local Corvette Master Technician from Bill Heard Chevy here in Atlanta. He confirmed what I've been suspecting for a while now, I'm losing the 3/4 gears in my 700R-4. He says its time for a replacement. He said I could go with a GM replacement, or go with some after market transmission which he'd install. Has anyone replaced their transmission with either. GM has a three year, 50,000 mile warranty, but since I'll only put on maybe 1,000 miles in three years is that a big deal? There are many aftermarket trannys available from TCI, Monster, etc. Any input/advice would truely be appreciated. Thanks, Jim
InGaNow is offline   Reply With Quote
Old 03-21-08, 04:16 AM   #2
Rick and Arleen Ball
CCDV Club Member
 
Join Date: Mar 2001
Location: Fairless Hills, Pa.
Posts: 3,442
Rick and Arleen Ball
Good Morning Jim!
Is your 85 stock?
If it is, and you don't race your Vette or run it hard, Go with the GM replacement.
Then again, if you have modified your 85 to Drag Race or even autocross you may want to go with a TCI Streetfighter set-up.
BUT, if you just do alot of normal cruising and some occasional spirited driving a stock 700 R4 will more than serve your needs.
Rick

Last edited by Rick and Arleen Ball; 03-22-08 at 03:59 AM.
Rick and Arleen Ball is offline   Reply With Quote
Old 03-21-08, 07:00 AM   #3
RichRog
CCDV Club Member
 
Join Date: Apr 2003
Posts: 864
RichRog
Rick,

Crossfire was in the 84, L98 in the 85.
RichRog is offline   Reply With Quote
Old 03-21-08, 11:17 AM   #4
Bob Weiss
CCDV Club Member
 
Bob Weiss's Avatar
 
Join Date: Mar 2001
Posts: 2,828
Bob Weiss is an unknown quantity at this point
If Stock 85-L98 go with the GM Unit OR have a good shop rebuild what you have!

Bob
__________________
Bob Weiss
CCDV Past Pres.(1993, 94 & 95), Past Board Chairman
CECF President
NCM Founding Member and Past Ambassador
CCDV Life Member
Bob Weiss is offline   Reply With Quote
Old 03-22-08, 01:19 AM   #5
InGaNow
Probationary Member
 
Join Date: Mar 2008
Posts: 3
InGaNow is on a distinguished road
Hi Folks, thanks for the input. If it matters, my 85 turned port L-98 is mildly modded with the following: forced-air induction, air-foil, MAS screens removed, hypertec stage 1 chip, adjustable fuel pressure regulator, under-drive pullys, tpis long-tube hedders, high-flow cat, low restriction mufflers, and 3:73 rear gears. Again, any input is truely appreciated as my economic stimulus check (and then some) is now ear-marked for the ole' 85. You guys are the best, Jim
InGaNow is offline   Reply With Quote
Old 03-22-08, 03:57 AM   #6
Rick and Arleen Ball
CCDV Club Member
 
Join Date: Mar 2001
Location: Fairless Hills, Pa.
Posts: 3,442
Rick and Arleen Ball
Quote:
Originally Posted by RichRog
Rick,

Crossfire was in the 84, L98 in the 85.
I stand CORRECTED!
Rick and Arleen Ball is offline   Reply With Quote
Old 03-22-08, 10:38 AM   #7
Tony B.96LT4
CCDV Club Member
 
Tony B.96LT4's Avatar
 
Join Date: Mar 2001
Posts: 2,870
Tony B.96LT4 is an unknown quantity at this point
Go with the aftermarket tranny. You have mods, you will want more mods, it's a Corvette thing!
__________________
96' LT4-1/4 mile best time 12.688
Tony B.96LT4 is offline   Reply With Quote
Old 03-23-08, 11:27 PM   #8
Plain Insane
CCDV Club Member
 
Plain Insane's Avatar
 
Join Date: Feb 2003
Posts: 271
Plain Insane
Cool 700r4

Jim: I have a heavily modified, supercharged motor in my 87. I currently run a 700R4 with some modified internal parts. The biggest problem with this trans is the pressure drop between shifting gears. This trans was only meant to handle 215-230 Hp. In my trans it is the original basket and case. I have a custom billet pump and rotor assembly from Calif. which keeps my pressures at 275lbs. My second gear band is wider than stock, extra clutches and plates as well as better servos, reverse manual valve body and an 2800 Trans Specialties converter. JG Transmissions in Willow Grove did mine and it has sustained 500t Hp. Another problem trying to change trans in the vette is that nothing fits and there is no crossmember. It sounds as though the mods you have are not too major. Best bet on a basically stock motor is GM with a Warranty. I can tell you this: the more Hp the more extensive work you will need on the trans. Generally stock trans doesn't like to shift over 5500rpm with pressure behind it.
Plain Insane is offline   Reply With Quote
Old 03-25-08, 01:26 AM   #9
InGaNow
Probationary Member
 
Join Date: Mar 2008
Posts: 3
InGaNow is on a distinguished road
Thank You all very much! I really appreciate your help. I'm taking a bunch of info I've pulled from the net, and all the club advice, to my technician tomorrow. Best Regards, Jim
InGaNow is offline   Reply With Quote
Post New Thread Reply

Tags
700r4, replacement


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Replacement! JCO3ZO6 Product/Service Recommendations 5 01-07-08 05:40 PM
Air compressor replacement JT-C6 Off Topic 9 11-14-07 09:47 AM
Convertible Top Replacement JCO3ZO6 Product/Service Recommendations 3 01-30-07 08:55 AM
Glass Replacement Top asylumkeeper22 Parts For Sale/Wanted 1 04-26-04 04:34 AM
Speaker replacement ???? Bill Burkholder C5 Specific Tech Talk 3 12-12-03 05:30 PM


All times are GMT -4. The time now is 05:05 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.