10-11-2009, 09:10 PM
|
#11 (permalink)
|
|
...beats walking...
Join Date: Jul 2009
Location: Tucson, AZ
Posts: 3,037
Thanks: 51
Thanked 266 Times in 204 Posts
|
...correct, it's common to wear/chip synchro "teeth" but not the actual mechanically-engaged gear teeth...to break one of them usually means a piece of hard metal (brass might do it, but usually not) has broken loose from something and physically gotten between the engaging gear teeth, which if you notice in the illustrations, are always engaged with their mating gear...all engagement is via the synchro.
__________________
2011 Chevrolet Cruze LTZ 1.4LT 6A
2009 Pontiac Vibe 1.8L/SIDI 4A
2004 Pontiac Vibe 1.8L/MFI 4A
2003 Ford Focus ZX5 2.0L/Zetec 4A
1971 Dodge Charger 318 3A
1970½ Plymouth AAR 'Cuda 340/6BBL 4M
1968 Dodge Charger 383 3A
1967 Plymouth Barracuda Formula S 383 4M
1965 Plymouth Barracuda Formula S 273 4M
Last edited by Old Tele man; 10-11-2009 at 09:21 PM..
|
|
|
|
|
10-11-2009, 09:42 PM
|
#12 (permalink)
|
|
Moderate your Moderation.
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,236
Thanks: 868
Thanked 294 Times in 248 Posts
|
If someone told me that the teeth broke off the gear, I'd assume they meant the helical splines that engage from gear to gear, which transfer power between gears.
Probably the furthest thing from my mind would be the dog-teeth, or those things that engage the gear to the input/output shaft (whichever one free spins when gears aren't engaged, usually output, I think) so that it can begin transferring power from the input shaft, to the drive gear, which sends power to the driven gear (via the "teeth" or Helix Splines), which sends power to the output shaft, eventually going to the differential and driving the wheels.
The fact that you're getting an easily reproducible grinding noise suggests that you've destroyed a synchronizer, though.
__________________
"Ώʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
I'd like to think that people might open their eyes at some point... instead, I find it more and more likely that I'll just close mine.
-- Author kept secret.
Je ne veux pas d'une meilleure vie. Je veux κtre heureux avec celle que j'ai maintenant.
(I do not want a better life. I want to be happy with the one I have now.)
|
|
|
|
|
10-11-2009, 09:45 PM
|
#13 (permalink)
|
|
...beats walking...
Join Date: Jul 2009
Location: Tucson, AZ
Posts: 3,037
Thanks: 51
Thanked 266 Times in 204 Posts
|
Quote:
Originally Posted by Christ
The fact that you're getting an easily reproducible grinding noise suggests that you've destroyed a synchronizer, though.
|
...my diagnosis too. But, if there REALLY are pieces of "iron teeth" in there, that's BAD news.
__________________
2011 Chevrolet Cruze LTZ 1.4LT 6A
2009 Pontiac Vibe 1.8L/SIDI 4A
2004 Pontiac Vibe 1.8L/MFI 4A
2003 Ford Focus ZX5 2.0L/Zetec 4A
1971 Dodge Charger 318 3A
1970½ Plymouth AAR 'Cuda 340/6BBL 4M
1968 Dodge Charger 383 3A
1967 Plymouth Barracuda Formula S 383 4M
1965 Plymouth Barracuda Formula S 273 4M
|
|
|
|
|
10-11-2009, 09:54 PM
|
#14 (permalink)
|
|
Moderate your Moderation.
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,236
Thanks: 868
Thanked 294 Times in 248 Posts
|
Quote:
Originally Posted by Old Tele man
...my diagnosis too. But, if there REALLY are pieces of "iron teeth" in there, that's BAD news.
|
Most definitely. In fact, I'd be inclined to say that if there are pieces of anything in there, trouble is afoot.
__________________
"Ώʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
I'd like to think that people might open their eyes at some point... instead, I find it more and more likely that I'll just close mine.
-- Author kept secret.
Je ne veux pas d'une meilleure vie. Je veux κtre heureux avec celle que j'ai maintenant.
(I do not want a better life. I want to be happy with the one I have now.)
|
|
|
|
|
10-11-2009, 09:58 PM
|
#15 (permalink)
|
|
...beats walking...
Join Date: Jul 2009
Location: Tucson, AZ
Posts: 3,037
Thanks: 51
Thanked 266 Times in 204 Posts
|
...both require tearing down the tranny, but IMHO swapping in new synchros is much easier and less costly than changing out a mating gear-set (because, then you really should refresh all the synchro too...ultimately too much money).
__________________
2011 Chevrolet Cruze LTZ 1.4LT 6A
2009 Pontiac Vibe 1.8L/SIDI 4A
2004 Pontiac Vibe 1.8L/MFI 4A
2003 Ford Focus ZX5 2.0L/Zetec 4A
1971 Dodge Charger 318 3A
1970½ Plymouth AAR 'Cuda 340/6BBL 4M
1968 Dodge Charger 383 3A
1967 Plymouth Barracuda Formula S 383 4M
1965 Plymouth Barracuda Formula S 273 4M
|
|
|
|
|
10-12-2009, 09:56 AM
|
#16 (permalink)
|
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 5,379
Thanks: 158
Thanked 366 Times in 254 Posts
|
I used Redline in my 03 Matrix (came with it when I purchased the car), and I have Royal Purple in the Paseo. When I put the Royal Purple in the Paseo, it made a noticeable difference when the car was cold in the winter. It wasn't noticeable in the summer. I'd still highly recommend synthetic, whatever brand you go with.
|
|
|
|
|
