Transmissions and Drivetrain Need help with your trans? Problems with your axle?

transmission problem?

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Old Jun 3, 2010 | 12:02 PM
  #1  
TPI TERR's Avatar
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From: So Cal
Car: 87 IROC-Z
Engine: LsX
Transmission: MN12 6speed
Axle/Gears: 3:42
transmission problem?

just few days ago i was trying to haul *** and shift into second and i struggled putting it in.
it does not whine, doesn't not grind or pop out of gear. same thing for 3rd gear. but it just doesn't go in smooth like before. yet alone the pro 5.0 shifter is kinda choppy but its just not smooth to put in.. it drives normal shifting under 3k.

im not pushing 400rwhp. its a daily driver ls1 third gen


any suggestions?
low on tranny oil ?
i re bleed my hydraulics and greased up by the pivot on the shifter. it looked dry felt a bit better but still .

i believe i have a tiny leak from my rear main seal can this be the key to this problem? moisture on the clutch ?

im going to drain out the tranny fluid tmrw. if not its time to drop the tranny.
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Old Jun 4, 2010 | 03:52 AM
  #2  
duckmanquacker's Avatar
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Joined: Sep 2007
Posts: 568
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From: Leander,TX
Car: 84 Z28 / 88 Trans Am / 87 base
Engine: L69 H.O. / 468 BBC / 2.8 v6
Transmission: 89 700R4 / TH375B / 700R4
Axle/Gears: 3.73 open / 3.23 posi / 3.42 open
Re: transmission problem?

Are you using the factory LS1 hydraulics? I recall they had an issue with doing quick shifts, as they didn't like it at times, usually a soft peddle follows.
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Old Jun 4, 2010 | 07:16 AM
  #3  
85MikeTPI's Avatar
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From: Elkton MD, USA
Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac
Re: transmission problem?

Originally Posted by duckmanquacker
Are you using the factory LS1 hydraulics? I recall they had an issue with doing quick shifts, as they didn't like it at times, usually a soft peddle follows.
It's call the "drill mod" to open up the restriction in the stock hyd line. I've already suggested in over on LS1tech and was blown off..
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Old Jun 4, 2010 | 03:55 PM
  #4  
TPI TERR's Avatar
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On Probation
iTrader: (9)
 
Joined: Feb 2005
Posts: 2,042
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From: So Cal
Car: 87 IROC-Z
Engine: LsX
Transmission: MN12 6speed
Axle/Gears: 3:42
Re: transmission problem?

Originally Posted by 85MikeTPI
It's call the "drill mod" to open up the restriction in the stock hyd line. I've already suggested in over on LS1tech and was blown off..
sorry man. didnt mean to blow u off. but i havent done that yet. do you suggest to do that first? i might post some pics of the small leak.
ita kinda understandable that oil on the pressure plate will affect the clutch performance noh?
i just hope its not the tranny. i just hope its a leak .

i also believe if it was the tranny i would notice the issue little by little. this just happened out of nowhere.
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Old Jun 4, 2010 | 03:57 PM
  #5  
TPI TERR's Avatar
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iTrader: (9)
 
Joined: Feb 2005
Posts: 2,042
Likes: 2
From: So Cal
Car: 87 IROC-Z
Engine: LsX
Transmission: MN12 6speed
Axle/Gears: 3:42
Re: transmission problem?

Originally Posted by duckmanquacker
Are you using the factory LS1 hydraulics? I recall they had an issue with doing quick shifts, as they didn't like it at times, usually a soft peddle follows.
yea im ussing the 4th gen pedals and hydraulics
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Old Jun 4, 2010 | 05:02 PM
  #6  
duckmanquacker's Avatar
Senior Member
 
Joined: Sep 2007
Posts: 568
Likes: 1
From: Leander,TX
Car: 84 Z28 / 88 Trans Am / 87 base
Engine: L69 H.O. / 468 BBC / 2.8 v6
Transmission: 89 700R4 / TH375B / 700R4
Axle/Gears: 3.73 open / 3.23 posi / 3.42 open
Re: transmission problem?

I'd follow his drill mod, it should help clear things up
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