Transmission Diagnosis Help.
#153633
December 12, 2005 10:59 pm UTC
December 12, 2005 10:59 pm UTC
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Anonymous
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Anonymous
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Hey guys, you know that DSM's aare notorious for breaking trannies. It isn't because they are weak, it's because of how they are driven.
Transmission Diagnostics.
Gear Clash (Grinding noise when shifting):
a) Worn blocker rings (This is part of the synchronizer assembly).
b) Clutch not disengaging properly
Clicking Noise (Heard in one single gear with the vehicle in motion).
a) Broken or chipped part of gear tooth (It can be on the main gear, on the countershaft(clutch shaft) or output shaft (main shaft).
Generally Noisy (In all forward speeds)
a) Low lubricant or incorrect lubricant b) Transmission not securely mounted
Growling Noise (With clutch engaged and transmission in neutral -- will also be heard on acceleration as a steadily increasing whirring).
a) Worn or faulty input shaft(Clutch shaft, main drive gear) bearing
Growling Noise (With the vehicle moving in all gears).
a) Worn or defective countershaft or bearings
Growling Noise (Heard in all gear ranges except 4-5.
a) Roller bearings that supports the main shaft at the front that is in the rear of the input shaft. These are either damaged or were missing (If you overhauled your transmission and forgot to put these back in).
Violent Banging/shudder (Heard and felt in the vehicle just starts to move--- this is caused by abuse).
a) Broken main drive gear teeth. b) Broken main clutch gear teeth.
Slips or jumps out of gear (Visually occures on acceleration and deceleration.
a) Loose synchro hub on the main shaft splines. b) Worn synchro insert grooves on the synchronizer sleeve.
c) Bearing at the front of the main shaft disintegrated causing the shaft to wobble.
d) Worn detent mechanism
e) Worn thrust washers/helical gear axial movement.
Anyway, those are the basics. So if you are having any of these issues, consider this write up.
Jesse
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Re: Transmission Diagnosis Help.
#153636
December 12, 2005 11:25 pm UTC
December 12, 2005 11:25 pm UTC
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Anonymous
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Anonymous
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Miguel than you are the man for having the original tranny lol. My 2g 2nd gear synchro assembly took a crap on me before.
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Re: Transmission Diagnosis Help.
#153638
December 12, 2005 11:33 pm UTC
December 12, 2005 11:33 pm UTC
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Anonymous
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Anonymous
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If you maintain a tranny well but can't shift for beans, your tranny will fail on you. However, it won't fail as fast as a person that doesn't maintain the tranny properly. 1. People shift like maniacs 2. Lack of maintainence. equals = Broken tranny
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Re: Transmission Diagnosis Help.
#153639
December 12, 2005 11:57 pm UTC
December 12, 2005 11:57 pm UTC
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Joined: Nov 2003
Posts: 2,857 Oakville, ON
Nigel Smith
Insane Member
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Insane Member
Joined: Nov 2003
Posts: 2,857
Oakville, ON
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My AWD went 240,000kms with about 100-150 hard launches, and lots of banging gears on the original stock tranny. My FWD now has about 230,000 on the original tranny and CLUTCH =) and it still shifts smooth. I agree with Sergio, all about the maintenance. edit, and keeping the beating it takes within its limits, redline dumps and 8000+ rpm shifting will drastically cut these trannies lifespans down.
Past 1992 Tsi AWD 1992 Tsi 14.30@100 Stock w/ MAF-T 1992 Tsi AWD 13.03@105 1.71 60' 1991 Tsi AWD
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Re: Transmission Diagnosis Help.
#153640
December 13, 2005 12:59 am UTC
December 13, 2005 12:59 am UTC
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Anonymous
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Anonymous
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Alright guys. Everyone that babies there trannies and have got a lot of mileage from them should list the things they do. For example, changing the tranny oil after 15,000 KM or someting.
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Re: Transmission Diagnosis Help.
#153642
December 13, 2005 05:55 am UTC
December 13, 2005 05:55 am UTC
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Joined: Dec 2005
Posts: 167 brantford, Ontario
Evan Vezsenyi
Regular Member
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Regular Member
Joined: Dec 2005
Posts: 167
brantford, Ontario
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speaking of trannies... my buddy has offered me a tranny and tail stock for mmy car. its a evo that allows you to change from awd to fwd. anyone heard of these? are they strong? or will i really just be wasting my time?
Evan Vezsenyi Mortgage Consultant Mortgage Alliance Ottawa 519.209.3200
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Re: Transmission Diagnosis Help.
#153648
December 15, 2005 05:53 am UTC
December 15, 2005 05:53 am UTC
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Joined: May 2004
Posts: 1,239 Ontario
Malcolm Harris
Serious Member
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Serious Member
Joined: May 2004
Posts: 1,239
Ontario
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Well my tranny sounded like metal on metal in 1st&2nd, poped out of 5th with 245k's on a N/T tranny, pulled her apart and bingo the inputshaft and couple of other bearings wear worn, replaced those, seals and a 5th-rev synco and she's smooth as can be with 269k's and turbo @ 15psi, just shift proper and maintain them as said. I drive my car hard, always have, but you gotta shift right with these cars!
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Re: Transmission Diagnosis Help.
#153650
December 15, 2005 11:42 am UTC
December 15, 2005 11:42 am UTC
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Joined: Jan 2005
Posts: 546 Ontario
Luke Sturgeon
Serious Member
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Serious Member
Joined: Jan 2005
Posts: 546
Ontario
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I have 178km's and mines decent but still makes some humming once in awhile or grinds when cold... but I think it's because of the wrong fluid in tranny, what is the best fluid I can put in it? I wanna change it this weekend also what about the transfer and rear diff, thanks.
1991 Eagle Talon TSi and thats all you need to know.
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Re: Transmission Diagnosis Help.
#153651
December 15, 2005 04:48 pm UTC
December 15, 2005 04:48 pm UTC
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Joined: Nov 2003
Posts: 2,857 Oakville, ON
Nigel Smith
Insane Member
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Insane Member
Joined: Nov 2003
Posts: 2,857
Oakville, ON
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Originally posted by Garrett Sturgeon: I have 178km's and mines decent but still makes some humming once in awhile or grinds when cold... but I think it's because of the wrong fluid in tranny, what is the best fluid I can put in it? I wanna change it this weekend also what about the transfer and rear diff, thanks. Personally, I used GM Synchromesh in my gearbox and TC of all DSM's I've owned, and always plain old 80w90 gear oil in the rear end.
Past 1992 Tsi AWD 1992 Tsi 14.30@100 Stock w/ MAF-T 1992 Tsi AWD 13.03@105 1.71 60' 1991 Tsi AWD
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Re: Transmission Diagnosis Help.
#153653
December 17, 2005 05:13 am UTC
December 17, 2005 05:13 am UTC
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Joined: Oct 2005
Posts: 10,749 Belleville, Ontario
Ryan Laliberte
No-Lift-To-Shift.... Stock. :)
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No-Lift-To-Shift.... Stock. :)
Senior Member, with Far TOO Much Time on Their Hands
Joined: Oct 2005
Posts: 10,749
Belleville, Ontario
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Any recommendations for gear oil? Some of the best.. some of the worst? I would like to overhaul my tranny in the spring... (330000 highway).
AWDAuto 1996 TSi AWD Automagic12.24 @ 113 - Small 16G FP Green HTA - 11.42/123 Team Pump Gas and Meth RTMRacing - Your Canadian source for DSM Parts "Every moment you live is pregnant with the next moment of your life" --Jim CarreyLast Login: September 28, 2021
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Re: Transmission Diagnosis Help.
#153655
December 18, 2005 05:21 am UTC
December 18, 2005 05:21 am UTC
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Joined: May 2004
Posts: 1,239 Ontario
Malcolm Harris
Serious Member
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Serious Member
Joined: May 2004
Posts: 1,239
Ontario
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I use the recomended Mopar synthetic manual trans Lubricant 75W-85, P/N 04874459, it's expensive if you don't know someone who owns a garage. My old mitsu mirage, which has the same inturnals as the N/T, wouldn't shift in the winter well, so I put Lucas trans-fix mixed with ATF and it worked like a charm. Adam Clay at Eastway Chrysler gives club discounts, and will know what your asking for.
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Re: Transmission Diagnosis Help.
#153656
December 19, 2005 07:06 pm UTC
December 19, 2005 07:06 pm UTC
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Anonymous
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Anonymous
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I always been hearing how the BG synchro shift makes a huge difference in shifting. People say it cures notchy shifting. I am just wondering if it really makes that big of a difference.
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Re: Transmission Diagnosis Help.
#153657
December 22, 2005 05:59 pm UTC
December 22, 2005 05:59 pm UTC
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Joined: Nov 2004
Posts: 123 St. Agatha
Mike Hart
Regular Member
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Regular Member
Joined: Nov 2004
Posts: 123
St. Agatha
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i have noticed a difference with BG syncroshift, in my awd's. used to run castrol sytech gear oil. Back to the original post, very good info, seems about right to me. and yes the 2nd gear double snycro trannies are stronger, but not in all areas just a few things are stonger otherwise there the same. just did my 4th rebuild for a beater awd i got, and alot of the stuff is the same. if anyone needs any tips i have learned what to do and not to do when building one. the 93 one i build for my good car i beat the crap out of. not problems, just make sure to do the shaft/bearing preload correctly, otherwise quick shifting sucks, maybe ok for the normal driver though...
10.4@135 1G AWD 10.0 05' GSX-R1000
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