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| Transmission All about Transmission |
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| Transmission All about Transmission |
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03-17-2008, 12:28 PM
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Burnt out synchros @ 1500kms
I have a 2008 2.2 Cobalt LT.
I've driven it carefully, with only a few 6000rpm shifts. I took it into the dealership today for some slight roughness and a slight clunk/grind noise downshifting from 5th -> 4th. Turns out my synchros are toast. They are replacing under warrenty... but still 1500kms? the car is only 2 months old? A friend of mine suggested having the dealer use synthetic gear oil when replacing the synchros. Has any one else heard anything about weak synchros in 08' 2,2 5-speed models? Will shifting at lows rpms (sub 2000) have any affect on this? 
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03-17-2008, 10:42 PM
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There are issues with the F35 transmission cases cracking from hard launching, but that is an SS/SC issue. Haven't heard much about the F23 having serious reliability issues, maybe you have a lemon transmission. That's why GM stopped using the Toyota sourced 5-speed in the early Ions, they were crap as far as durability went. The Getrag trannys are pretty stout though, atleast more so than the Aisin(Toyota) units.
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 2005 Cobalt LS: K&N intake w/ GMPP Pre-filter, LE5 intake manifold, LSJ exh manifold, LSJ downpipe, GMPP sport exhaust, Eibach Pro-Kit springs, Kosei K-1 wheels, DC Sports strut bar, Corbeau bucket seats, tinted windows, short antenna, partial rear debadge, 2006-present GM fender badges, stainless steel suicide knob, PIAA bulbs 
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03-18-2008, 06:53 AM
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8/10 this is caused by the drivers shifting habbits. typicaly a syncro will go because of holding the clutch in alot."city driving" every company has items built on a friday. lol.. the tranny thats in the 2.2l is a saab tranny it can handle 300 hp. if your dumping the clutch at 3 grand then expect this to happen.
Last edited by nramlow2006; 03-18-2008 at 09:30 AM.
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03-18-2008, 10:48 PM
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Quote:
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2005 Cobalt LS: K&N intake w/ GMPP Pre-filter, LE5 intake manifold, LSJ exh manifold, LSJ downpipe, GMPP sport exhaust, Eibach Pro-Kit springs, Kosei K-1 wheels, DC Sports strut bar, Corbeau bucket seats, tinted windows, short antenna, partial rear debadge, 2006-present GM fender badges, stainless steel suicide knob, PIAA bulbs
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03-20-2008, 11:18 PM
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I have a 2008 ls 5-speed and ever since i have had it its been really ruff when it comes to shifting, mines mostly been in 1st and 2nd gear though....I have never had it taken in to get looked at but ya i'v been having some trouble wit the tranny too
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03-21-2008, 11:52 PM
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Quote:
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2007 Cobalt SS/NA   Performance:K&N short ram intake, Purple Hornies glasspack, Jet Stage 2 Visual: color match bowties, shorty antenna, blue footwell led's, partial debadge Coming Soon:Vibrant 4-2-1 Header/DP
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03-22-2008, 12:00 AM
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Quote:
Sport Compact Car picked up a used S2000 a while back and the previous owner missed fourth at the top of third and slammed into second...I guess even Vtec engines don't like 15,000 rpm.
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2005 Cobalt LS: K&N intake w/ GMPP Pre-filter, LE5 intake manifold, LSJ exh manifold, LSJ downpipe, GMPP sport exhaust, Eibach Pro-Kit springs, Kosei K-1 wheels, DC Sports strut bar, Corbeau bucket seats, tinted windows, short antenna, partial rear debadge, 2006-present GM fender badges, stainless steel suicide knob, PIAA bulbs
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03-24-2008, 02:54 PM
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^^ I did that once getting on the freeway.. I felt the engine scream and my tires started squealing. Luckily i pulled it out quick enough.
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 "A wise man speaks because he has something to say, A fool speaks because he has to say something" March 2008 in yourcobalt.com calendar
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built on a friday
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