Bad vibe

bigred90gt · 11-16-2002, 02:04 PM

Between 50 and 70 mph, I get a pretty bad vibration in the car through the stick. Below 50mph and above 70 mph, it drives like a dream. Also, when I hit about 85mph, I get a nasty rattle that I can feel in the stick and hear. It sounds like the tranny is about to fall apart. When I decelerate, it stops rattling at about 70mph.
It doesn't matter if I put it into neutral to coast down, or if I ride the gears down. Any ideas or corrective suggestions would be greatly apreciated. Every time I hit about 85mph, it sounds like the something is about fo fall out. Thanks in advance for the help.
Caymon

MEDIK418 · 11-16-2002, 04:52 PM

Happened to my son's 89 the exact same way. His had about 180,000 miles on it though. When it gave up the ghost, the 5th and reverse gears took a s*** and the main shaft pretty much destroyed itself in the process. Check the tail shaft of the transmission, THere's a sleeve in there that the front yoke slides into that wears out or often slides out and lets the yoke bang around in there until it eats the transmission. When you do this you might look at the yoke and see if there's a worn spot on one side and check the U-joints as well. I'm not sure what caused ours to go south because it pretty much destroyed everything in the process. One ominus sign is damage to the rear transmission seal.

bigred90gt · 11-16-2002, 05:59 PM

I've got about 185,000 miles on the car, but the tranny is only about 5000 miles. The last time it went, I lost 3rd and 4th. The guy told me that the ain shaft broke. If it did, wouldn't that prevent you from going anywhere? Back to the point, I have had the tailshaft bushing and housing go to sh** on me before. I hope it is not the tranny again. If so, does anyone know where I can get a good deal on a tremec? I have gone through 3 t-5's in the 2 years that I have had this car. Thanks for the response.
Caymon

11-16-2002, 02:04 PM	#1
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	Bad vibe Between 50 and 70 mph, I get a pretty bad vibration in the car through the stick. Below 50mph and above 70 mph, it drives like a dream. Also, when I hit about 85mph, I get a nasty rattle that I can feel in the stick and hear. It sounds like the tranny is about to fall apart. When I decelerate, it stops rattling at about 70mph. It doesn't matter if I put it into neutral to coast down, or if I ride the gears down. Any ideas or corrective suggestions would be greatly apreciated. Every time I hit about 85mph, it sounds like the something is about fo fall out. Thanks in advance for the help. Caymon __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

11-16-2002, 04:52 PM	#2
MEDIK418 Registered Member Join Date: Mar 1999 Location: Amarillo, Texas, USA Posts: 780	Happened to my son's 89 the exact same way. His had about 180,000 miles on it though. When it gave up the ghost, the 5th and reverse gears took a s*** and the main shaft pretty much destroyed itself in the process. Check the tail shaft of the transmission, THere's a sleeve in there that the front yoke slides into that wears out or often slides out and lets the yoke bang around in there until it eats the transmission. When you do this you might look at the yoke and see if there's a worn spot on one side and check the U-joints as well. I'm not sure what caused ours to go south because it pretty much destroyed everything in the process. One ominus sign is damage to the rear transmission seal. __________________ 1986 four-eyed LX coupe, 358 Cleveland, Tremec TKO600/centerforce clutch, dish cut Probe forged pistons, comp cams hyd.roller cam, .579/.588@224/230, Edel.performer, 670 holley street avenger, CPR custom built long tubes, ported and polished 4bbl heads, manley valves, beehive springs, MSD peo-billet dist/MSD6AL, fluidamper, 5 lug conv. with 17x8 bullits there's more but it's still not finished yet. Oh, and the oldest boy is turning his 89 GT into a FFR cobra this next summer.

11-16-2002, 05:59 PM	#3
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	I've got about 185,000 miles on the car, but the tranny is only about 5000 miles. The last time it went, I lost 3rd and 4th. The guy told me that the ain shaft broke. If it did, wouldn't that prevent you from going anywhere? Back to the point, I have had the tailshaft bushing and housing go to sh** on me before. I hope it is not the tranny again. If so, does anyone know where I can get a good deal on a tremec? I have gone through 3 t-5's in the 2 years that I have had this car. Thanks for the response. Caymon __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

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