HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

Comments: 0

Latest topics
» Which turbo trans for my swap application?
Yesterday at 8:10 pm by racertomtom

» Poly based strut mounts on exchange
Fri Aug 18, 2017 10:16 pm by xschop

» 18x10" Enkei wheels
Wed Aug 16, 2017 9:59 pm by Sterling Doc

» Around the block
Tue Aug 15, 2017 11:46 am by Red944ls1

» RX7 Caliper Swap
Mon Aug 14, 2017 8:13 am by osx86ftw

» Cooling solutions please!
Sun Aug 13, 2017 3:15 pm by yamamtx

» Holley intake, vacuum pump and cross member spacer
Sun Aug 13, 2017 12:33 am by zeusrotty

» Sparkydog's Abnormal Build - 944 With L67 + Ford Stuff & CARB Legal
Sat Aug 12, 2017 3:42 pm by sparkydog

» LSA Supercharged 86 Porsche 944
Sat Aug 12, 2017 7:41 am by haroldk

» Coolant / header tank cap
Wed Aug 09, 2017 7:56 pm by Arthropraxis

August 2017
MonTueWedThuFriSatSun
 123456
78910111213
14151617181920
21222324252627
28293031   

Calendar Calendar

Log in

I forgot my password


Transmission Lash

View previous topic View next topic Go down

Transmission Lash

Post  Arthropraxis on Thu Feb 25, 2010 7:30 pm

I know I read this before but I can't find it now. How important is it to get the gear lash checked? Can any transmission shop do this or should only a Porsche shop? I need to fix the transmission mount so I may as well drop the transmission to get it checked if needed. If I have it out I may as well do the 5th gear swap. Probably be a good time to do the cam gear for the VSS on the axle. This list just keeps growing.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  944-LT1 on Thu Feb 25, 2010 8:53 pm

Takes a specific porsche tool... although theres a guy on rennlist that made one. I would just go straight to someone that has the tools and know how.

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 95
Location : NOTRE DAME

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Thu Feb 25, 2010 9:07 pm

Any idea on the cost/benefit ratio? I was told I had a LSD transaxle but the other day I rotated one wheel and the other wheel rotated opposite. The clutch pack could be worn out causing this or the PO could be misinformed. I would have to check option codes and the code on top of the trans. If the transmission turns out not to be LSD it may not be cost effective to get it checked. I will have to call for a quote. I would imagine it is not cheap even with the trans out of the car.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  v8carreragts on Fri Feb 26, 2010 12:22 am

Just curious, why do you think it needs to be checked? It's not something that is generally done unless you think you have a problem.


It can be done without the tool but it is a pita. I don't know if I would trust just anyone though. You really need to know these transaxles. And without the tool you still need a dial indicator, a method of mounting it and something to bolt to the output flange that is the proper length to measure the back lash.
avatar
v8carreragts

Posts : 327
Join date : 2009-06-08
Age : 60
Location : Tucson, AZ

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Fri Feb 26, 2010 7:00 am

I remembered reading a post regarding transaxle failures and a couple of them were discussing the need to get this checked as preventative maintenance. While I had the transaxle off of the car I was going to have it checked out if needed. I just wanted to know if it was a priority or not. After searching on other sites I couldn't find where anyone did this unless they were having signs of suspected pinion wear. So I am leaning to probably not needed. I need a more seasoned opinion than my own.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  stuart f. wright on Fri Feb 26, 2010 7:28 am

like my dad always said dont fix it if it aint broke but fix it if its about ready to break.thats pretty seasoned .lol
avatar
stuart f. wright

Posts : 297
Join date : 2009-07-19
Age : 55
Location : effingham illinois

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Fri Feb 26, 2010 7:52 am

I think I will go with that. Although I bought the car broke, I have no idea if the trans works or not. I will have to wait and see.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  cfgioja on Fri Feb 26, 2010 8:36 am

Yea I am not the only one who bought a broke car and doesnt know what shape the trans is in. This sucks.
avatar
cfgioja

Posts : 804
Join date : 2009-11-22
Age : 33
Location : Clarksville, AR

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Sat Feb 27, 2010 2:56 pm

I just looked and the trans does have a LSD code. Sweet.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  Porch on Sun Feb 28, 2010 8:12 pm

Nice!

944-LT1 was saying you should check it like every 60k, but that seems a little ridiculous to me. I've put together a few differentials and never had them go significantly out of spec (in terms of backlash), even after hundreds of thousands of miles! So...i dunno, maybe it's worth it if you've got the tool and the time, but i wouldn't worry about it unless you have reason to suspect something is wrong.
avatar
Porch

Posts : 851
Join date : 2009-09-02
Age : 35

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Sun Feb 28, 2010 8:16 pm

Thanks, that seems to be the consensus. I just wanted to make sure I didn't need to worry about it.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

Re: Transmission Lash

Post  cfgioja on Sun Feb 28, 2010 8:30 pm

I thought LSD was a good thing.
avatar
cfgioja

Posts : 804
Join date : 2009-11-22
Age : 33
Location : Clarksville, AR

Back to top Go down

Re: Transmission Lash

Post  944-LT1 on Sun Feb 28, 2010 11:21 pm

I dont know if it was 60K or 80K. I cant find it right now. But Porsche recommended that the lash be checked and shimmed if needed every 60-80K miles. Alot of things seem ridiculous but they had their reasons and I dont challenge it. In fact, it makes perfect sense.

The common pinion/ring failure suggests that either the lash was outta spec (footprint of gears continually wearing and reaching the edges of the teeth where theres less and less strength) or the pinion bearing failed in one of many ways. These transmissions are not like a Dana 44. Theres alot more to cause the lash to go outta specification. A Dana 44 can easily go over 100K without a problem because they are quite simple in design, made of steel, and have alot less stuff inside which makes it easy to check and adjust lash.

Im not saying everyone has to do this check but simply that it is a perfectly acceptable explanation to the growing occurence of pinion/ring failures. Once the teeth are meeting at the weaker leading edges and someone shock loads the tranny with this condition, a tooth breaks, gets caught on another and.......thats it. Maybe not a maintenance job for someone with a regular NA box but if I had an expensive 944 transmission, say a 944 turbo S box, best believe I would check the lash at 60-80K before using it in my conversion!

_________________
[You must be registered and logged in to see this image.]

[You must be registered and logged in to see this link.]
avatar
944-LT1
Moderator
Moderator

Posts : 1251
Join date : 2009-06-09
Age : 95
Location : NOTRE DAME

Back to top Go down

Re: Transmission Lash

Post  Arthropraxis on Mon Mar 01, 2010 8:32 am

Now I am back on the fence. I will call to get an estimate on a shop to check this out. Finding someone qualified to check this may be a challenge.
avatar
Arthropraxis

Posts : 1071
Join date : 2009-09-02

Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum