is this bad? car jumps when shifting to D
04-24-2002, 08:46 AM
#3
Supreme Member
Join Date: Sep 1999
Location: Manassas VA
Posts: 3,197
Likes: 0
Received 6 Likes
on
5 Posts
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
Sounds like broken tranny mounts for everybody. Yes this is bad, the jump is your transmission trying to come through the floor to say hello. Everytime it does this it is stressingthe hell out of your u-joints on the drivesahft as well. Replace your tranny mount ASAP, and in the meantime, take it easy on it or else you're going to be posting about how your driveshaft fell out in a few days.
For info on changing the tranny mount do a search. It's is a very common topic.
For info on changing the tranny mount do a search. It's is a very common topic.
04-24-2002, 10:05 AM
#5
Supreme Member
Join Date: Aug 2001
Location: Troy, MI, USA
Posts: 1,041
Likes: 0
Received 0 Likes
on
0 Posts
so, lemme get this straight - the lurch from park/neutral to putting it into gear (rev/drive/OD/1/2) is bad? It means a busted tranny mount?? 
If this is true - how difficult is it to replace the tranny mount?? More info/experiences would be great, as I personally lack the time to check this out thoroughly! Thanks!
If this is true - how difficult is it to replace the tranny mount?? More info/experiences would be great, as I personally lack the time to check this out thoroughly! Thanks!
04-24-2002, 11:25 AM
#6
Supreme Member
Join Date: Jan 2001
Location: Rock Hill, SC
Posts: 1,411
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1999 Pontiac T/A Firehawk
Engine: ***'s Engine
Transmission: T56
You're kidding, right Ed?
Every automatic carbed car I've *ever* driven has jumped when put into D. A pathetically low stall converter and a high engine rpm when on the choke will do it.
Sure, I suppose it could be a busted tranny mount... but the few cars I've driven with a broken tranny mount didn't actually do that--they simply clunked hard when you went WOT or let off the gas at WOT.
Every automatic carbed car I've *ever* driven has jumped when put into D. A pathetically low stall converter and a high engine rpm when on the choke will do it.
Sure, I suppose it could be a busted tranny mount... but the few cars I've driven with a broken tranny mount didn't actually do that--they simply clunked hard when you went WOT or let off the gas at WOT.
04-24-2002, 01:40 PM
#7
Supreme Member
Join Date: Sep 1999
Location: Manassas VA
Posts: 3,197
Likes: 0
Received 6 Likes
on
5 Posts
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
Whoops, guess i was half asleep when i read that this morning. Coulda sworn the first post said it jumped whenever he put it in gear and hit it or something, i definitely thought i read a more dramatic symptom than that
Trending Topics
04-25-2002, 11:54 AM
#9
Supreme Member
Join Date: Jan 2001
Location: Rock Hill, SC
Posts: 1,411
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1999 Pontiac T/A Firehawk
Engine: ***'s Engine
Transmission: T56
I can see that 
.
We've got a '79 vette, smogger 350, TH350 trans. When that car is on high idle, you better be damn sure you've got your foot on the brake good when you shift into D. Even then, the car "squats" noticeably. Once it's on low idle it's not as bad, but it you can still feel it. I really doubt anything is wrong with it.
.We've got a '79 vette, smogger 350, TH350 trans. When that car is on high idle, you better be damn sure you've got your foot on the brake good when you shift into D. Even then, the car "squats" noticeably. Once it's on low idle it's not as bad, but it you can still feel it. I really doubt anything is wrong with it.
Thread
Thread Starter
Forum
Replies
Last Post
db057
TBI
10
08-11-2015 10:11 PM
