Bear's Racing Today - Page 2 - Pontiac GTO Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #11 of 20 (permalink) Old 10-15-2012, 11:22 AM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
Given the history, I'm questioning everything now. The same shop built the trans and the converter - the only major assemblies on this car I didn't build myself. I had to take it back to them once because the conveter was way loose - the motor would be north of 5000 rpm as soon as I hit the throttle. They redid the converter and it seemed right, but now this. Now I'm wondering it the real problem in both cases was a clutch that wasn't holding. It was ok for normal driving but couldn't live with full torque combined witb sticky tires. If that's the case, then once I get the trans right I'm going to have a converter that's too tight. Sigh...

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
Sponsored Links
Advertisement
 
post #12 of 20 (permalink) Old 10-15-2012, 11:44 AM
 
Join Date: Oct 2007
Location: Long Island NY
Posts: 4,714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garage
Bear, If you decide to rebuild a transmission....check out CONTINENTAL torque convertors.....they "understand " Pontiacs VERY well!!! Eric
Eric Animal is offline  
post #13 of 20 (permalink) Old 10-23-2012, 12:37 PM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
After much reading and studying (this book is great: http://www.amazon.com/Modify-Hydra-Matic-Transmission-Motorbooks-Workshop/dp/0879382678 ) and getting recommendations from folks over on PSP http://psp.aquacomp.net/default.asp . I dropped the car off at http://jakesperformance.com/Home_Page.html in Sanger for him to go through and do one if his Stage II transmission builds on.

He's also going to tweak the governor to raise ths shift points a little, and add an auxilliary trans cooler. Plus he'll open up the converter and make sure it's not damaged/contaminated.

I was set to do all this myself, but after talking with him I learned that the Trans-Go shift kits are "ok" for most regular street engines but once you start getting close to 500 HP they can have problems supplying enough bite to the direct clutch. He has his own valve body calibrations he's developed for his Stage II builds. Plus, he replaces the rear thrust washers with a Torrington bearing, uses the 34-element intermediate sprag (which I'm supposed to already have, but I have my doubts), and adds an additional clutch plate to the intermediate and direct clutch. We talked quite a bit about the various types of clutch frictions and he convinced me that he knows his stuff. He runs all his builds on a transmission dyno to check them out before delivering them. Add to all the above the fact that a good set of bushing drivers is crazy expensive, and you have the reasons I decided to let him to do the work.

I'll know in a couple of weeks or so.

Bear

BearGFR
Springtown, TEXAS

Last edited by BearGFR; 10-23-2012 at 12:52 PM.
BearGFR is offline  
post #14 of 20 (permalink) Old 10-23-2012, 01:49 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 7,935
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Bear, you did exactly the right thing. The trans will be bulletproof and worryfree, and will match the rest of your drivetrain in beefiness. It'll be interesting to hear what he finds when he tears it down. Keep us posted on that score. Can't wait for you to get the car back....I'll bet you'll be surprised.
Jeff
geeteeohguy is offline  
post #15 of 20 (permalink) Old 10-25-2012, 10:37 AM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
I'm optimistic. They definitely give me the impression they know what they're doing and that it will be right. Everything Jake said made sense and was logical. That's a curse I have - a logical mind - even though I've not been into a TH400 myself, I've studied them enough to understand quite a bit. I'm a lot happier when things make sense. One of these days I'll tear down that spare and get my hands all up in its guts.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #16 of 20 (permalink) Old 10-28-2012, 03:11 AM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
I spoke with Jake Friday. So far, he's found that it did in fact roll the intermediate sprag, and it did have a 34-element one. He said it's very unusual for that to happen to one of those, unless they used a poor-quality (or perhaps a used) sprag. He also didn't like the springs in the direct clutch - said they were way too stiff - and didn't like the way the hydraulics were set up. I'm feeling good about it.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #17 of 20 (permalink) Old 10-28-2012, 06:58 AM
Former Moderator
 
ALKYGTO's Avatar
 
Join Date: Mar 2010
Location: Wentzville, Mo.
Posts: 2,860
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 5 Post(s)
Garage
Still staying with the auto valve body or going with a full manual?


Trannybrake?
ALKYGTO is offline  
post #18 of 20 (permalink) Old 10-28-2012, 11:12 AM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
I"m staying with auto and no trans-brake, at least for now. They are going to tweak the governor for me to put the shift points at around 5500 plus install an aux trans cooler.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #19 of 20 (permalink) Old 11-10-2012, 12:04 PM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
Well..... I picked it up last night after work. I spent a good long time visiting with the owner and learned a lot, and liked what I was hearing more and more - convinced that the guy really knows his stuff.

Then.....
On the way home I noticed oil pressure was zero -- Well, obviously it had pressure and I really knew better, so I figured they'd managed to disconnect the wire from the sending unit during the R&R since it's right there by the trans filler tube. No biggie.

This morning I went out to fix that.
Found the sending unit wire was pinched between the block and the transmission. Well, ok --- it's an irritation but still manageable.
I put the car up in the air.
That's when I found one of the trans cooler line fittings at the trans leaking - pretty bad.
That's when I noticed the trans had a factory pan on it instead of my chrome one with the drain plug.

Am I just snake-bit when it comes to transmissions in this car or what????

I can't decide if I'm going to be mad or just be defeated...

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
post #20 of 20 (permalink) Old 11-10-2012, 03:45 PM Thread Starter
Super Moderator
 
BearGFR's Avatar
 
Join Date: Aug 2008
Location: Springtown, TX
Posts: 5,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Garage
Update....

Well, ok. I fixed all the problems myself, except for the tranny pan, but I did speak with the shop owner and he's going to get mine back to me as well has 'having a talk' on Monday with his guy who did the R&R.

I reckon I feel better now.

Bear

BearGFR
Springtown, TEXAS
BearGFR is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Bear's Happy BearGFR 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 5 07-30-2012 01:56 AM
"VOE" Exhaust - Bear's Version BearGFR 1964-1974 Tempest, LeMans & GTO Projects, Barn Finds & Restoration Discussions 15 08-15-2011 07:33 PM
Popped my racing cherry today lukekeith The Lounge 3 04-20-2007 04:46 PM
Street/Drag Racing vs Road/Track Racing? baron_iv Racing and Kill Forum 8 12-31-2006 08:48 PM

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

 
For the best viewing experience please update your browser to Google Chrome