trans differences - HD vs non - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-24-2011, 10:04 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Rockstar04's Avatar
 
Join Date: Feb 2009
Location: Northern Illinois
Posts: 789
Thanks: 0
Thanked 0 Times in 0 Posts
Rockstar04 is on a distinguished road
Default trans differences - HD vs non

I think I am having trans problems in my 98 park ave (ultra) and have a spare trans outta a 99 park ave ( not ultra ) and am wondering what I will want to swap over and what I might want to swap from the hd to the non hd.
Rockstar04 is offline   Reply With Quote
Old 06-24-2011, 10:10 PM   #2
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I believe it is the diff, out put shaft, diff cover, and right axle.
Danthurs is offline   Reply With Quote
Old 06-27-2011, 09:16 AM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

The differences

Drive and driven gears: HD had 33/37, Non HD had 35/35 (this effects final gear ratio)
Output shaft: HD is about 1/8" or so longer than Non-HD. I've heard of any not swapping this w/o any issues.
Output Sun Gear: This gear is imperative to be matched to the differential. You can count the teeth and determine which differential is in the trans.
Differential: HD is a 3.29 ratio, non-HD are different and smaller in size as well.
Diff cover: HD is larger for the larger diff.

All other parts are the same in the same year/same version of the trans.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
non hd trans for s/c motor lordvader Performance, Brainstorming & Tuning 12 09-23-2012 12:11 PM
97 SSE with GP engine and trans - trans ID'd, new questions Slow Learner 1992-1999 10 04-08-2008 11:18 AM
replaced trans line now trans acts up ? LuvmySse 1992-1999 1 12-07-2007 10:07 AM
Revisting My Trans Issue's (Trans shop 2/19/07) Lowrider0308 1992-1999 30 02-19-2007 03:52 PM
Which products do you use for lubes (non-engine/trans)? agrazela General GM Chat 3 01-13-2007 04:49 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:29 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.