tires don't wanna spin after gears

da89cup · 09-29-2001, 04:14 AM

I got 4.10s put in with new clutch friction discs, friction modifier, all new bearings, & I can't do doughnuts. I have an 89 coupe with a 5 speed. When I just bought the car with 2.73s I could do all the doghnuts I wanted, but eventually I couldn't do them anymore because of the clutch discs in the diff (so I thought). So after rebuilding the diff & putting in 4.10s I thought the problem would be solved. I still can't do doughnuts. They start to spin together but when I try to go into the fishtail the car doesn't fish-tail. What the hell is going on? I have myself on tape at the track doing a burn-out & only one tire is spinning. The owner of the shop who did my rear end said this is normal. If it's normal how come I could do doughnuts before & now I can't. Please help, it's very frustrating spending that kind of money & you still have the same problem. Thanks in advance.

------------------
89 coupe, 351W, 351W heads, 30lb injectors, 190lph pump, 80 maf, 70 tb, ? cam, cobra upper, gt 40 lower, 4.10s, (14.594@96.97)

John · 09-29-2001, 07:30 AM

I dont think that not doing donuts is a problem

. My gears were installed a year ago, and I to rebuilt posi and new bearings. @ the track my ride will start to get sideways on burnout, but then driver side tire stops spinning. On the street both tires will fry till they die. You gotta remember the track is a super sticky surface. I am planning on rebuilding my posi again, but this time I'm gonna do it myself and use extra discs (couple of the old ones).John Oh BTW not to rag or anything but mid 14 w/ your mods seems slow to me. My coupe ran a 14.03 w/out cam intake & head work on a stock stall AOD and its a full weight car.

------------------
89 Notch: ASP Pullies,
K&N Air,Transgo shiftkit,Trans. cooler,FMS 3 core , FMS 4:10's, 1.5" cowl, cold air kit, hooker shorties(jet hot coated), O/R H-Pipe, ASP solid mounts, Energy Sus. Trans. Mnt. BBK 70mm TB, MSD 6al, Dual elec. fans, 5.0 Firepower Kit, Scorpion 1.6 RR's, Flowmasters, 73 mm MAF, cobra intake(ported), 1" phenolic spacer,ported stock heads and crower #512 cam.

[This message has been edited by John (edited 09-29-2001).]

Stang Runner · 09-29-2001, 07:30 AM

You have a 351w? and best time is (14.594@96.97) something is not right is the heads stock from the late 70's or something? With 30lb injectors And your Times That is OVER kill or some thing is wrong with the car It should be atlest in the 13's

------------------
14.28@103.0 on a G-Tech Engine: Steal Mounts, Under drive pulleys, K&N, Home ported Lower Intake, No power steering, No A/C
Drive Train: 3.55, World Class T-5,
NOW it is time for Real power STUFF I Have and will put on after I get everthing: Mac cold intake, 70MM TB, Valve covers (COOL ONES)255 Fuel pump NOS Dry 75HP.
Next to get: Rocker Arms,Cam,TFS Heads,Injectors 24,Holley Intake, What might I need???See It at <A HREF="http://www.computerconquest.com" TARGET=_blank>www.computerconq

2FastLX · 09-29-2001, 11:45 PM

Take the rear cover off and get that stock retainer spring out of there and replace it with an F-150 spring. They are a lot beefier. I have one in mine and my car will get posi from a second gear roll and lay twin patches of rubber until the car grabs and goes. Neither feathers off before the other. I haven't tried a doughnut yet, but I know the car could easily make me dizzy.

------------------
Gunning for 12's!

Buy your parts here
ICQ# 42269241

09-29-2001, 04:14 AM	#1
da89cup Registered Member Join Date: Feb 2001 Location: edmonton, alberta, canada Posts: 55	tires don't wanna spin after gears I got 4.10s put in with new clutch friction discs, friction modifier, all new bearings, & I can't do doughnuts. I have an 89 coupe with a 5 speed. When I just bought the car with 2.73s I could do all the doghnuts I wanted, but eventually I couldn't do them anymore because of the clutch discs in the diff (so I thought). So after rebuilding the diff & putting in 4.10s I thought the problem would be solved. I still can't do doughnuts. They start to spin together but when I try to go into the fishtail the car doesn't fish-tail. What the hell is going on? I have myself on tape at the track doing a burn-out & only one tire is spinning. The owner of the shop who did my rear end said this is normal. If it's normal how come I could do doughnuts before & now I can't. Please help, it's very frustrating spending that kind of money & you still have the same problem. Thanks in advance. ------------------ 89 coupe, 351W, 351W heads, 30lb injectors, 190lph pump, 80 maf, 70 tb, ? cam, cobra upper, gt 40 lower, 4.10s, (14.594@96.97)

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09-29-2001, 07:30 AM	#2
John Registered Member Join Date: Dec 1998 Location: Ft.Myers, FL. Posts: 150	I dont think that not doing donuts is a problem . My gears were installed a year ago, and I to rebuilt posi and new bearings. @ the track my ride will start to get sideways on burnout, but then driver side tire stops spinning. On the street both tires will fry till they die. You gotta remember the track is a super sticky surface. I am planning on rebuilding my posi again, but this time I'm gonna do it myself and use extra discs (couple of the old ones).John Oh BTW not to rag or anything but mid 14 w/ your mods seems slow to me. My coupe ran a 14.03 w/out cam intake & head work on a stock stall AOD and its a full weight car. ------------------ 89 Notch: ASP Pullies, K&N Air,Transgo shiftkit,Trans. cooler,FMS 3 core , FMS 4:10's, 1.5" cowl, cold air kit, hooker shorties(jet hot coated), O/R H-Pipe, ASP solid mounts, Energy Sus. Trans. Mnt. BBK 70mm TB, MSD 6al, Dual elec. fans, 5.0 Firepower Kit, Scorpion 1.6 RR's, Flowmasters, 73 mm MAF, cobra intake(ported), 1" phenolic spacer,ported stock heads and crower #512 cam. [This message has been edited by John (edited 09-29-2001).]

09-29-2001, 07:30 AM	#3
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	You have a 351w? and best time is (14.594@96.97) something is not right is the heads stock from the late 70's or something? With 30lb injectors And your Times That is OVER kill or some thing is wrong with the car It should be atlest in the 13's ------------------ 14.28@103.0 on a G-Tech Engine: Steal Mounts, Under drive pulleys, K&N, Home ported Lower Intake, No power steering, No A/C Drive Train: 3.55, World Class T-5, NOW it is time for Real power STUFF I Have and will put on after I get everthing: Mac cold intake, 70MM TB, Valve covers (COOL ONES)255 Fuel pump NOS Dry 75HP. Next to get: Rocker Arms,Cam,TFS Heads,Injectors 24,Holley Intake, What might I need???See It at <A HREF="http://www.computerconquest.com" TARGET=_blank>www.computerconq

09-29-2001, 11:45 PM	#4
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	Take the rear cover off and get that stock retainer spring out of there and replace it with an F-150 spring. They are a lot beefier. I have one in mine and my car will get posi from a second gear roll and lay twin patches of rubber until the car grabs and goes. Neither feathers off before the other. I haven't tried a doughnut yet, but I know the car could easily make me dizzy. ------------------ Gunning for 12's! Buy your parts here ICQ# 42269241