tranny grinds on high rpm 1-2 shift Wtf

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GMdestroyer

New Member

Jun 15, 2002

149

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0

Mar 15, 2004

#1

• Mar 15, 2004

• #1

When i drive my car regular it doesnt grind gears at all. But if I take it up to my 6200 shift point in 1 and hit second it will grind as it goes into gear what could cause this. Also i a tremec 3500 will 4000 miles on it with a hurst shifter.




Ps I shift a 6200 because i have a 331 with victor jr heads and intake with a 100 shot.

 

1

10HoleLX

Member

Mar 6, 2004

257

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17

Southern California

Mar 15, 2004

#2

• Mar 15, 2004

• #2

GMdestroyer said:

When i drive my car regular it doesnt grind gears at all. But if I take it up to my 6200 shift point in 1 and hit second it will grind as it goes into gear what could cause this. Also i a tremec 3500 will 4000 miles on it with a hurst shifter.




Ps I shift a 6200 because i have a 331 with victor jr heads and intake with a 100 shot.

Click to expand...

My Guesses are:
1.Synchros are shot (How hard were you on that tranny within those 4000 miles?)
2.Low fluid or wrong fluid in tranny
3.clutch out of adjustment

 

J

jester111

New Member

Mar 3, 2004

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Toronto, Ca

Mar 15, 2004

#3

• Mar 15, 2004

• #3

hi
that would be your syncros. 1st check the oil see if its toped up. 2nd check and see what oil is in the tranny some transmissions use automatic fluid. 3rd drain oil and replace with the thickest oil available. I dont want to steer you wrong but, i would install a thicker oil, i found a cheap one a walmart, that was 80/140 it did the trick for me but a little hard on the shift when cold great when hot.

 

go-stang5.0

New Member

Jan 27, 2003

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Glenview,Il

Mar 16, 2004

#4

• Mar 16, 2004

• #4

Tremecs use Gm synchromesh trans fluid. What do you have in there? Also, that seems odd for a tremec... When I read the title I was thinking you had a high milage T-5 or something. I would make sure your using the right fluid and maybe call tremec cuz it does sound like the 1-2 synchro but it shouldnt go that quickly even with your motor.

 

88stangmangt

Active Member

Nov 25, 2003

2,332

1

48

Stafford,VA

Mar 16, 2004

#5

• Mar 16, 2004

• #5

ya sounds like a bad tremec.

 

S

SmockDoiley

New Member

Jun 14, 2003

1,591

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San Diego, CA

Mar 16, 2004

#6

• Mar 16, 2004

• #6

I doubt its the synchros cause the tranny is pretty new. I bought a tremec from a guy and he said 2-3 was bad. It would grind, but then I changed the fluid from ATF to gear oil and it worked fine. Guy didnt know what it was so he had ATF in it. Your suppose to use GM synchromesh or you can use gear oil. Either one will correct your problem.