Drivetrain Grinding into 1st and 2nd, T5

F

FireGT1017

Member

Jul 29, 2020

19

2

13

Vancouver

Jul 31, 2020

#1

• Jul 31, 2020

• #1

Hey everyone,

My 1989 GT grinds when I shift it at a normal speed into first and second. Every other gear is perfectly fine and if I put the car into first and second slowly it does not grind at all. Any idea's of what it could be? Also, any ways to self diagnose what the issue is.

Thanks in advance.

 

redNfast

Active Member

Apr 5, 2020

70

33

28

Woodstock, GA

Jul 31, 2020

#2

• Jul 31, 2020

• #2

Every time or when warm it goes away? Best guess 1 & 2 synchronizer. If the transmission oil has never been change (89) you could give that a try got nothing the loose.,

 

Reactions: FireGT1017

Blown88GT

Founding Member

Nov 13, 1999

2,283

524

164

Palm Beach Gardens, FL

Aug 2, 2020

#3

• Aug 2, 2020

• #3

FireGT1017 said:

Hey everyone,

My 1989 GT grinds when I shift it at a normal speed into first and second. Every other gear is perfectly fine and if I put the car into first and second slowly it does not grind at all. Any idea's of what it could be? Also, any ways to self diagnose what the issue is.

Thanks in advance.

Click to expand...

You're shifting into 1st gear while the car is moving?

 

F

FireGT1017

Member

Jul 29, 2020

19

2

13

Vancouver

Aug 2, 2020

#4

• Aug 2, 2020

• #4

Blown88GT said:

You're shifting into 1st gear while the car is moving?

Click to expand...

When I say normal speed I'm referring to how fast I change gears not the speed of the car

 

50Dreamer

Founding Member

Nov 14, 2000

688

17

38

CT

Aug 2, 2020

#5

• Aug 2, 2020

• #5

I’d suspect the synchros. How does the clutch engagement feel?

 

Reactions: FireGT1017

F

FireGT1017

Member

Jul 29, 2020

19

2

13

Vancouver

Aug 2, 2020

#6

• Aug 2, 2020

• #6

50Dreamer said:

I’d suspect the synchros. How does the clutch engagement feel?

Click to expand...

Clutch feels good, I agree it's probably synchro's.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,248

17,929

224

Massachusetts

Aug 2, 2020

#7

• Aug 2, 2020

• #7

Sitting at a stop with parking brake set, put trans in nuetral and let the clutch out.

now, press clutch in and immedistely go into 1st. Does it go without grinding?

Now, do the same thing but this time press the clutch in and count off 10-15 seconds and then shift to 1st. Does it grind?