I went a to a few trans shops today. My transmission has this horrible shudder off the line and it feels like its jumping as opposed to a nice burnout. However its random and happens about 1 out of 10 launches
I took it to aamco first, the guys were morons, they were not interested in a test drive kept reassuring me that they would replace "everything" but the guy was not sure what that refered to when I asked him...second I took it to another shop, the guy was not interested in selling the product, he wanted to take a test drive. the guy test drove it and said the reason the transmission was "jumping" off the line was because of the summer tires I had on the car. I left. The third shop addressed me the same way, did not try to sell me on a rebuild but wanted to test drive as well. They said it was the torque converter slipping against the flexplate causing it to slip. the 4th shop would not do a test drive until wednesday. 5th shop. The winner.
First thing I see up front is a 97-99ish GTP up on one of the 5 lifts or so. The service manager/owner Jason is at the front desk. Before I even said anything, Jason asks me what size sc pulley I have on the car and if I'm modded
. I was like, holy **** this guy knows something about 3800'* lol. Apparently he owned a 93 SSEi for 3 years that he rebuilt the motor from the crank up with a cam and DIY ported heads
So I'm thinking cool, a trans shop that is cool with me modding the car...thats alright. One of the only nascar tracks in the northwest is located in Twin Falls, and apparently this shop builds most of the trans'* for them. the head builder dude Tony and I took a test drive, He abused the trans in everyway possible to try to isolate a diff or planatary gearset problem...flooring it on a turn, launching at 3000RPM in Drive and Reverse...etc....He drove the car harder than I've ever seen someone drive a bonneville lol. Well maybe with the exception of Todd and the dumpster incident. Anyway tony'* bet is on a couple missing sprockets or whatever they are called on the gearset, not a diff problem. The crap tires are going on this car soon since I know they are going to "test" the trans quite a bit. we probably lost a good 3/32 of tread in about 10 minutes today lol.
So it looks like its going to get rebuilt next week. Tony pointed out that the 4t65'* and several other gm fwd trans have the problem with the 4th gear hub/shaft assembly. Thats a given, so is the planetary gearset.
Here is the tenative list:
Torque Converter - probably stock
Master Rebuild Kit - not sure of brand
Shift Kit - Not sure of brand
4th gear hub/shaft - he mentioned "hardened", not sure of brand
"Hardened drum assembly" - not sure what this is
Engine Mainseal/crank seal gasket
trans mounts, replace 3 of them regardless of condition, they have 180K on them.
that is the current list, perhaps others who have had their trans built recently would have some advice on what to replace while they are inside, anything that could fail or that should be beefed up to prevent the trans from puking. LSD is out, gear change is out, I'm open to all other suggestions
Meanwhile the manager/owner expressed interest in my 93 SSEi after the trans is built, I may just trade the car on a trans rebuild for the 98, we'll see.
So what other goodies should I put in there?