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4th gear syncros shot?


Dbl_D718

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Update since it got bumped: I took it to the shop and the manager asked to go for a ride with me so I could replicate the problem for him. Tried probably 6 times shifting pretty darn hard at WOT and ~6300 RPM and it would not grind. This is after about three weeks of driving like grandma so it wouldn't grind.

 

We decided to cancel the repair and I have extra-s fluid to change in and we'll see what happens.

MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII
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have my fourth gear grind going, third to fourth and fifth to fourth. came about just shy of 90K miles. some days it behaves others it grinds no matter what I do. changed my tranny fluid when I did my clutch last summer (12K miles ago?) with royal purple 75w90 synchromesh and yea...grindy grind grind. Should probably drain the tranny again anyways (bye bye $100 in fluid) and see how much residue I built up on the magnet and replace with either what BAC5.2 recommends or just go straight extra-S
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I got my fluid changed with extra-s yesterday, haven't driven it hard yet but so far it feels a little better than before. Not sure what old fluid typically looks like, but mine was still golden brown.

 

Anyway tho, I'll get the chance to try a good 3-4 shift tomorrow so we'll see if it grinds.

MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII
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  • 4 weeks later...
Update since it got bumped: I took it to the shop and the manager asked to go for a ride with me so I could replicate the problem for him. Tried probably 6 times shifting pretty darn hard at WOT and ~6300 RPM and it would not grind. This is after about three weeks of driving like grandma so it wouldn't grind.

 

We decided to cancel the repair and I have extra-s fluid to change in and we'll see what happens.

When my syncrhos when out, it would grind at any rpm. I could put the clutch to the floor and try to put it into 4th and it would grind regardless of rpm.

 

Sounds like you just needed some extra-s lovin' (no pun intended :lol:).

lol
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switched to mobile 1 75-90 and the 4th gear grind came. then i immediately switched it to royal purple, same weight and the grinding happens once and a blue moon. next im going to switch back to subaru extra s. i have kept up on my maintenance and changed my tranny fluid every 30k miles. i think the 6 spd xmsn are picky which fluid goes in them
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I've been on the Extra-S since my last post and no longer grind in 4th. But 3rd seems a little clunkier than it was before. Whatever tho. No grinding is all I care about.
MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII
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