2nd and 3rd grind - 3000GT/Stealth International Message Center

zacfrd · 03-18-2008, 12:14 PM

Hi when I shift into 2nd and third it grinds some times. It is fine if I down shift though?? Any ideas. I have a 92 rt tt with a 5 speed.

chargerx3 · 03-18-2008, 12:20 PM

what fluid are you running in your trans?

zacfrd · 03-18-2008, 01:00 PM

redline synthetic

chargerx3 · 03-18-2008, 01:03 PM

is that the MTL stuff? if so then try checking your linkage, fluid level, or try switching over to Pennsoil Syncromesh. I did and it stopped my grinding. its like butter now.

zacfrd · 03-18-2008, 01:15 PM

I will look into it this weekend. I am also wanting to build a whole drive train for this car. I am not sure where to start aor wich route to go. I want high horse power like anyone else lol. Any ideas on how I should set this up? and where to find doner drive train to work on or should I just buy new?

Apache · 03-18-2008, 01:30 PM

I'm running BG Synchroshift in my 6-Speed and it occassionally yelps at me going into 3rd. And this is with my new tranny. My old one would do it going into 2nd sometimes. I think the problem is just that the synchros can't line up fast enough sometimes. My buddy's '91 R/T TT sometimes does it on 4th for him. Maybe just a design flaw?

phantomrt · 03-18-2008, 06:22 PM

Worn out synchronizers for the most part. The only other probability would be the clutch not disenguaging far enough between shifts. They used friction material for their synchronizers, which work better than anything else when they're new, but the problem is that they wear out. As that friction material gets thinner and thinner the more crunch you're going to get.

I have 80W90 conventional valvoline gear oil in my transmission and it works pretty well. But I think it may be better to just go with a thinner oil, such as 20W50 engine oil.

The way it is right now, if I start my Stealth and start driving it right away, when I push the clutch in to coast to the stop sign at the end of my road, it feels like the parking brake is dragging. Also, 2nd gear goes in with a hint of a crunch noise. I lifted the car in the air to look for any possible binding of the driveline. Everything spins smoothly, even by hand. I am blaming it on the 80W90 being a viscous jake brake when it is cold, but that doesn't even seem quite right. Once the engine/transmission are warmed up, the car coasts like any other car, and the shift crunch noise is gone and it shifts like butter.

If I do it again, I am going to try 20W50 oil or similar.

Import Power · 03-18-2008, 06:55 PM

Could be the friction rings, inner rings, or dog teeth on the gear and Hub. Or all of the above.

Apache · 03-19-2008, 11:32 AM

I guess the thicker gear oil could be to blame when it's cold. I know that my dad's old '74 Ford F-250 will actually creep if it's in first with the clutch in since the lube in that thing is REALLY thick. But once mine gets warmed up it shifts super smooth.

03-18-2008, 12:14 PM	#1 (permalink)
zacfrd New User - Please be kind Join Date: Dec 2007 Trader Rating: (0)	2nd and 3rd grind Hi when I shift into 2nd and third it grinds some times. It is fine if I down shift though?? Any ideas. I have a 92 rt tt with a 5 speed.

03-18-2008, 01:00 PM	#3 (permalink)
zacfrd New User - Please be kind Join Date: Dec 2007 Trader Rating: (0)	Re: 2nd and 3rd grind redline synthetic

03-18-2008, 01:03 PM	#4 (permalink)
chargerx3 Livin' the dream Join Date: Apr 2007 Location: nor-cal Drives: 92 dodge stealth TT Trader Rating: (0)	Re: 2nd and 3rd grind is that the MTL stuff? if so then try checking your linkage, fluid level, or try switching over to Pennsoil Syncromesh. I did and it stopped my grinding. its like butter now.

03-18-2008, 01:15 PM	#5 (permalink)
zacfrd New User - Please be kind Join Date: Dec 2007 Trader Rating: (0)	Re: 2nd and 3rd grind I will look into it this weekend. I am also wanting to build a whole drive train for this car. I am not sure where to start aor wich route to go. I want high horse power like anyone else lol. Any ideas on how I should set this up? and where to find doner drive train to work on or should I just buy new?

03-18-2008, 01:30 PM	#6 (permalink)
Apache Forum Member Join Date: Mar 2008 Location: Billings, Montana Drives: '97 3000GT VR-4 Trader Rating: (0)	Re: 2nd and 3rd grind I'm running BG Synchroshift in my 6-Speed and it occassionally yelps at me going into 3rd. And this is with my new tranny. My old one would do it going into 2nd sometimes. I think the problem is just that the synchros can't line up fast enough sometimes. My buddy's '91 R/T TT sometimes does it on 4th for him. Maybe just a design flaw?

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03-18-2008, 06:22 PM	#7 (permalink)
phantomrt Forum Member Join Date: Mar 2007 Location: Minnesota Drives: fast Trader Rating: (0)	Re: 2nd and 3rd grind Worn out synchronizers for the most part. The only other probability would be the clutch not disenguaging far enough between shifts. They used friction material for their synchronizers, which work better than anything else when they're new, but the problem is that they wear out. As that friction material gets thinner and thinner the more crunch you're going to get. I have 80W90 conventional valvoline gear oil in my transmission and it works pretty well. But I think it may be better to just go with a thinner oil, such as 20W50 engine oil. The way it is right now, if I start my Stealth and start driving it right away, when I push the clutch in to coast to the stop sign at the end of my road, it feels like the parking brake is dragging. Also, 2nd gear goes in with a hint of a crunch noise. I lifted the car in the air to look for any possible binding of the driveline. Everything spins smoothly, even by hand. I am blaming it on the 80W90 being a viscous jake brake when it is cold, but that doesn't even seem quite right. Once the engine/transmission are warmed up, the car coasts like any other car, and the shift crunch noise is gone and it shifts like butter. If I do it again, I am going to try 20W50 oil or similar. __________________ 92 Stealth R/T TT 73k 92 Daytona ES 2.5 Turbo / A523 103k 92 Lebaron GTC Conv. 2.5 Turbo / A568 158k 91 Daytona ES 3.0 V-6 / A543 190k 93 Geo Metro 1.0/5spd 126k resurrecting

03-18-2008, 06:55 PM	#8 (permalink)
Import Power Corn Its whats for boost Join Date: Jan 2002 Location: Behind the Wheel Drives: Vicki Insane Trader Rating: (210)	Re: 2nd and 3rd grind Could be the friction rings, inner rings, or dog teeth on the gear and Hub. Or all of the above. __________________ AEM Factory Trained Tuner 91VR4-3.0L-Stock heads and Cams-762AWHP 747AWTQ 30psi E100 Daily Driver 10.63@121mph SLTT-10.9 @ 140MPH Stock NA motor and NA heads/Cams T4 AWD 9.21 @ 154.98 T2 FWD 10.19 @ 140.31 T4-159.23 MPH Ran on 6G72 3.1L! T4-995AWHP Uncorrected 6G72 3.0L C16 T2-820FWHP 3.1L 27psi C16 91VR4 Red-17Gs w/supporting mods-sold 93SLTT/T2 91VR4 Pearl White-sold 91VR4 Black-sold 92VR4 Sandstone-sold 94VR4 Green-sold 93VR4 Pearl White-sold NG09 Title Sponsor 3SX Performance 3SX Performance Service Email

03-19-2008, 11:32 AM	#9 (permalink)
Apache Forum Member Join Date: Mar 2008 Location: Billings, Montana Drives: '97 3000GT VR-4 Trader Rating: (0)	Re: 2nd and 3rd grind I guess the thicker gear oil could be to blame when it's cold. I know that my dad's old '74 Ford F-250 will actually creep if it's in first with the clutch in since the lube in that thing is REALLY thick. But once mine gets warmed up it shifts super smooth.