700R4 problems - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-02-2010, 12:43 PM
Registered User
 
Join Date: Feb 2010
Location: Tampa, FL
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
700R4 problems

Just bought a 1988 IROC-Z with a 350TPI swapped in place of a 305. It has a 700R4 that supposedly has a shift kit, and a 'chip'.

Anyway, so the transmission apparently wouldnt shift through gears, although in 'park', the rear end does lock. When shifted into reverse, the reverse lights do come on. (not sure if that's relevant or not)

The guy said he had a mechanic come up and check the car out and the guy said it was most likely the torque converter. He said they dropped the pan, checked the fluid and there was no metal in the fluid. (I wasn't there, so I'm not sure if I believe that)

Anyway, so I put the car up on jackstands to get ready to check the trans and figured I'd at least turn the car on and shift through gears, etc.

In 'D', the wheels just sat idle-- no movement at all. When I blipped the throttle, the wheels spin slightly. Odd.

In 'R', the wheels just sat idle-- no movement, again. When I blipped the throttle, the wheels spun again, however, they spun forwards, not backwards. Even more odd.

Anyway, if I had to guess, I'd assume I have a grenaded trans, but I'm hoping that it's another issue. I know this isn't much to go on, but any ideas would be awesome. Thanks in advance!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-02-2010, 01:29 PM
richard stewart 3rd's Avatar
Registered User
 

Last journal entry: 351W rebuild
Last photo:
Join Date: Jan 2006
Location: tremont, pa.
Age: 69
Posts: 2,217
Wiki Edits: 0

Thanks: 13
Thanked 15 Times in 14 Posts
Hi,
Well the good part is you already have it on jack stands, it's now time to get the tools out, then the trans out for a rebuild
& a converter (I think it's dumb to rebuild w/out a new TQ) don't forget to flush the cooling lines & radiator cooler & do yourself another favor & get an after market cooler also.
Rich
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-02-2010, 02:09 PM
Registered User
 
Join Date: Feb 2010
Location: Tampa, FL
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the advice. So it does sound like a trans issue? I'm hoping it isn't something wrong with the rear end or anything like that..
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-02-2010, 06:14 PM
Overdriv's Avatar
Member
 
Last photo:
Join Date: May 2005
Location: IL
Age: 64
Posts: 740
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Double check the shift linkage.

Not having Park, doesn't mean it has a bad torque convertor.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-02-2010, 06:30 PM
Registered User
 
Join Date: Feb 2010
Location: Tampa, FL
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I never said it had an issue with park? In Park, the car is fine.. wheels dont spin. The issue is that when the car is on the ground, it doesnt move in ANY gear. I mean. in neutral I can push it.. but it just doesnt go anywhere on its own. The issue IS that when the car is up on jackstands and I put it in D, the wheels spin slowly FORWARDS but only when I give it gas.. i.e., not while idling. When in Reverse, the wheels spin slowly FORWARDS as well.. not BACKWARDS like they should.. and again, they dont spin while idling, only when I hit the throttle.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-03-2010, 09:28 AM
Overdriv's Avatar
Member
 
Last photo:
Join Date: May 2005
Location: IL
Age: 64
Posts: 740
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
I re-read your post, and it sounds like either a bad converter or you have no/low line pressure. I would check the line pressure. If it's within spec, there is something broken in the trans. Either way it's going to have to come out.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
700r4 upshift problems LeAnnCallahan Transmission - Rearend 2 12-03-2009 01:33 AM
87 camaro 700r4 problems Dans83Olds Transmission - Rearend 3 03-13-2006 05:16 PM
700r4 tranny problems william27103 Transmission - Rearend 14 08-14-2005 11:37 AM
Will A 82 700r4 Fit Into My 85 C-10 Without Problems? hwdponce Transmission - Rearend 4 06-05-2005 06:35 PM
700r4 problems zmichalies Transmission - Rearend 14 08-19-2003 07:33 AM


All times are GMT -6. The time now is 05:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.