Manual Trans.-second gear grind - Pontiac Solstice Forum
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post #1 of 61 (permalink) Old 02-12-2008, 06:39 PM Thread Starter
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Manual Trans.-second gear grind

Since new, the manual transmission grinds when shifting to second gear. I took it to the dealer at about 250 miles and left it over night. They could reproduce the grind, but stated that no fix existed. Several thousand miles later the trans still grinds into second. The condition only exists during ambient temperature conditions, summer, fall, spring, winter. Once the trans warms up, it shifts fine. Searching other threads on the manual trans revealed that this JAPANESE transmission uses 90 weight gear lube. I think the heavy gear lube is causing the syncro to balk. My 84 S10 manual used 10W30 motor oil for lube. My 89 Borg Warner T5 had ATF for lube. I can't believe that 90 weight gear lube is necessary in a modern manual trans. I would love to drain the gear box and fill it with 10W30 Mobil One synthetic for a test, but am concerned about voiding the warranty. No one at GM or the dealerships seem to have a fix. Anyone else having an issue with second gear??
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post #2 of 61 (permalink) Old 02-12-2008, 08:32 PM
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The first time i drove the car off the lot 2nd gear felt funny, my talon's transmission shifted better then my gxp's. Dealership said this was normal, i say bs.

1993 talon tsi awd - stock on the outside, modded on the inside
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post #3 of 61 (permalink) Old 02-12-2008, 09:21 PM
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Common.. my 06 was worse than my 07 GXP, but still present. Higher rpm s and warmer temp eliminate the problem..

what to say... what to say..

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post #4 of 61 (permalink) Old 02-12-2008, 09:34 PM
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second is fine for me, its the 2 to 3...click shift gets me. You have push it in or wait for it to go in smoothly.

I plan on going synthetic at 10k, which should take care of the cold shifts.

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post #5 of 61 (permalink) Old 02-12-2008, 09:40 PM
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find a factory equivalent synthetic gear oil and it will probably fix the problem. I changed out all the gear boxes on my Ranger and it made a huge difference when cold. It used to refuse to shift after sitting out all night in -5 degrees. Not with the synthetic though.
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post #6 of 61 (permalink) Old 02-13-2008, 06:14 PM Thread Starter
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Thanks to all for the timely replies! I'm going to dump the 90W and go with a thinner synthetic. I'll stop off at the local parts store tomorrow and see what they have. I'll post again if it helped or not. I hope the syncro is not totally destroyed.
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post #7 of 61 (permalink) Old 02-13-2008, 06:36 PM
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I thought getrag was a german company. Am I wrong?

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post #8 of 61 (permalink) Old 02-13-2008, 08:06 PM
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Getrag makes our differential. The manual trans is made by Asian.

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post #9 of 61 (permalink) Old 02-13-2008, 08:26 PM
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Quote:
Originally Posted by BLK GXP View Post
The manual trans is made by Asian.
*cough* Aisin

1993 talon tsi awd - stock on the outside, modded on the inside
2008 solstice gxp - Solo Performance 3" mach exhaust + hiflow cat - dyno sheet
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post #10 of 61 (permalink) Old 02-13-2008, 08:48 PM
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oops. I suppose aisin is almost asian, but not german.

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post #11 of 61 (permalink) Old 02-13-2008, 09:08 PM
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bingo Quincy I can totally agree with you I have the same problem! Push thee syncro issue...push...push

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post #12 of 61 (permalink) Old 02-14-2008, 01:15 AM
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I get a little bit of that second gear grind. To me, it feels like the clutch is not fully disengaging. Along with that symptom, I also can feel the car lunge a little if I shift it into first from neutral with the brakes applied, standing still, when cold. Kinda like the driveline is loading up a little bit. Again, it feels like the clutch is not fully disengaging. I have never felt that from a standard before.

I have a Mazda truck that was grinding into second when cold, and it was because the clutch wasn't fully disengaging, due to a bad slave cylinder.

Last edited by mcphelps; 02-14-2008 at 01:24 AM.
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post #13 of 61 (permalink) Old 02-14-2008, 06:59 AM
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In your response you mentioned getting a "thinner synthetic" Actually you probably want to get the same weight synthetic. The advantages of the synthetic are the sheer strength, low temperature performance and film strength.

Once the synthetic has coated all the moving parts, it leaves a film there that does not drain off and leave the potential for any metal to metal contact.

When the gearbox is "cold" the synthetic does not thicken up and resist movement like non synthetic lubricants can.
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post #14 of 61 (permalink) Old 02-15-2008, 05:41 AM
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Second Gear Grind

Quote:
Originally Posted by fivespokes View Post
Common.. my 06 was worse than my 07 GXP, but still present. Higher rpm s and warmer temp eliminate the problem..

what to say... what to say..
Mine does the same thing in second gear and disappears after warm up.

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Mods - Clearbra 3M tape, splash guards, PCMforless.com custom dyno tune.
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post #15 of 61 (permalink) Old 02-15-2008, 05:44 AM
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Anybody done a change of the transmission oil? I would like to know the procedure. I have already changed out my rear differential to synthetic Amsoil with the LSD additive.

Sly - everything but Onstar.
Mods - Clearbra 3M tape, splash guards, PCMforless.com custom dyno tune.
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