Help - Search - Members - Calendar
Full Version: 3rd to 2nd = GRIND!
914World.com > The 914 Forums > 914World Garage
ctc911ctc
Hello Again All Teeners,

After 100 little projects I have the silver bullet (silver '74 2.0) back on the road, first time it has been registered since 1984.

Runs great, needs paint and perhaps a tranny freshening??????

I replaced all of the guide nylon bushings and re-centered the stick shift.

However, when down-shifting 3rd to 2nd is horrible, (GRIND!) better when I double shift.

First to second is ok, though at times if I am too aggressive it too will grind.

WHATS NEXT ON MY LIST????? remove the 1st and reverse section of the tranny? Complete rebuild?

Can hardly wait!

Many thanks for all of the great guidance over the years.

CTC911CTC
rjames
Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.
rhodyguy
If you just push the lever forward going from 1st to 2nd the trans should jump into the neutral plane. This is where the dentension plate and springs in the shifter assem come in to play. Then you should be able to engage 2nd cleanly. If you want to bang gears buy a Mustang.
dr914@autoatlanta.com
QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth
ctc911ctc
I remember driving a new 914 in 73, the '73 tranny was very crisp and the linkage "jump" you mentioned was really apparent.

The 'jump' on the car we are working on is much less.

All of the bushings are lubed and slide easy, I have not touched the springs in the shift assembly. Might new springs help?

Thanks for the guidance!! - Mustang? Really? grin!



QUOTE(rhodyguy @ Oct 9 2019, 08:52 AM) *

If you just push the lever forward going from 1st to 2nd the trans should jump into the neutral plane. This is where the dentension plate and springs in the shifter assem come in to play. Then you should be able to engage 2nd cleanly. If you want to bang gears buy a Mustang.

ctc911ctc
Thank you VERY much for the reply.

Not sure I am ready to attack a 901 tranny - I have the books and can buy the jigs, as to the parts, is there a standard -rebuild kit- that you would recommend rather than take it apart and order what is necessary??

THANK YOU!


QUOTE(dr914@autoatlanta.com @ Oct 9 2019, 09:36 AM) *

QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth

Chris914n6
2nd is the most shifted and always the first to wear out in any car.

Parts are replaced after inspection. You will soon find that just 1 Porsche bearing is the cost of any other brands whole bearing kit....

There are ways to cheat the wallet, like swapping the infrequently used 5th gear parts to 2nd.

The DrEvil trans rebuild DVD is a great way to see what you are getting into and procedures.
rjames
QUOTE(ctc911ctc @ Oct 9 2019, 07:43 AM) *

Thank you VERY much for the reply.

Not sure I am ready to attack a 901 tranny - I have the books and can buy the jigs, as to the parts, is there a standard -rebuild kit- that you would recommend rather than take it apart and order what is necessary??

THANK YOU!


QUOTE(dr914@autoatlanta.com @ Oct 9 2019, 09:36 AM) *

QUOTE(rjames @ Oct 8 2019, 08:27 PM) *

Easy stuff first- Make sure clutch the cable is adjusted to disengage clutch when the pedal is 1/3rd of the way depressed.


I agree, first make sure that the clutch pedal is at the complete top of its travel and that you only have 1/2 inch of play before it gets hard to push, and that there is no first reverse grind at a complete stop. If all of that is good, it is the transmission, second gear in a down shift grinding is usually the first to wear out. If you cannot stand it, new sliders, syncros and dog teeth will solve it. Any shop will charge ten labor units to go through it. Labor is not bad, parts are. Special tools are needed to press off the dog teeth and check the ring gear and pinion depth



Search up Dr. Evil on the site. He's the resident transmission expert and sells a transmission rebuild DVD that walks you through the process. There isn't a rebuild kit that I'm aware of. You'll need to take it apart and figure out what needs to be replaced by inspecting what you have.

Ensure the cable is adjusted properly first. That'll take you 10 minutes tops.
Dr Evil
DVD is on its way. Thanks for the referral, fellas.

1st is by far the worst and most frequent to die. Dont down shift into first. 2nd is dead about 70% of the time.

10 labor units to go through it? I am under charging at 7 labor units to include setting and checking the ring and pinon depth, backlash, preload, etc. smile.gif
thelogo
Downshifting into 2nd screwy.gif
I don't do it. ( way to easy to nick reverse)
And i dont recommend it
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2019 Invision Power Services, Inc.