The Portal Hub: All things Pinzgauer, Haflinger, Volvo 303 and more.

The Portal Hub: All things Pinzgauer, Haflinger, Volvo 303 and more.

From Vince Sweeney: You have arrived at the original "Real 4x4's" Forums, founded in 1999.

The forum isn't free for me to keep up. Donations accepted securely with Paypal.

      
View unanswered posts | View active topics It is currently Thu Nov 23, 2017 11:33 pm



Reply to topic  [ 8 posts ] 
 3rd gear grinding. Worn synchro? 
Author Message

Joined: Fri Oct 14, 2016 11:20 am
Posts: 29
Post 3rd gear grinding. Worn synchro?
I have an issue with 3rd gear grinding when up shifting and down shifting (down shifting much much worse but up shifting is bad too). If I double clutch, it helps some. When the truck is cold, it's pretty bad regardless of double clutching or not. When warm, 95% of the grinding noise goes away when up shifting and double clutching. Down shifting is still really bad when warm and double clutching.

Is this a worn synchro or something else? What are my options for fixing it?


Thu May 18, 2017 3:13 pm
Profile

Joined: Wed May 16, 2012 6:27 am
Posts: 54
Post Re: 3rd gear grinding. Worn synchro?
...have you checked oil level ?
changed oil ?
If that does not help you have to change the synchronring.

For downshifting it will help reving it a little bit up while doublechlutching.
First you can try if its better resting a little bit longer in N if you change gears.


Fri May 19, 2017 10:31 am
Profile

Joined: Fri Oct 14, 2016 11:20 am
Posts: 29
Post Re: 3rd gear grinding. Worn synchro?
Uli-RT wrote:
...have you checked oil level ?
changed oil ?
If that does not help you have to change the synchronring.

For downshifting it will help reving it a little bit up while doublechlutching.
First you can try if its better resting a little bit longer in N if you change gears.


Thank you for the reply.

Yes I have replaced the oil twice just to flush anything old out. It helped a little bit but not much.

For changing the synchroring, where could I get parts for this? I've tried looking up the zf s4-18 gearbox but there is almost nothing online.

I don't know much about gearboxes. Would a synchroring from something else work and would a mechanic be able to make another one work?


Fri May 19, 2017 10:47 am
Profile

Joined: Wed May 16, 2012 6:27 am
Posts: 54
Post Re: 3rd gear grinding. Worn synchro?
may be this can help:
http://www.c303.de/c303-pdf/parts-list/ ... ogue15.pdf

The Pinzgauer does also have a ZF Gearbox. Perhaps you can find some parts there:
www.puch.at


Fri May 19, 2017 11:13 am
Profile

Joined: Wed May 16, 2012 6:27 am
Posts: 54
Post Re: 3rd gear grinding. Worn synchro?
...more details for Puch:
http://www.puch.at/2751_Antriebswelle.aspx?LNG=de


Looking at the prices I would go for a good used gearbox.


Fri May 19, 2017 11:16 am
Profile

Joined: Fri Oct 14, 2016 11:20 am
Posts: 29
Post Re: 3rd gear grinding. Worn synchro?
Uli-RT wrote:
...more details for Puch:
http://www.puch.at/2751_Antriebswelle.aspx?LNG=de


Looking at the prices I would go for a good used gearbox.


Thanks for the info. Yikes! Yeah, I'm looking for a used one now...


Fri May 19, 2017 5:31 pm
Profile
User avatar

Joined: Wed Jan 27, 2016 12:14 pm
Posts: 237
Location: Redmond, WA
Post Re: 3rd gear grinding. Worn synchro?
I picked up a remanufactured unit from Expedition Imports that I've been really happy with. Throw some Redline MT in it and you're good to go :)


Sent from my iPhone using Tapatalk

_________________
King County Search & Rescue | WA Regional Special Vehicles Unit
1972 710M - Building up for SAR use
Follow my build: http://www.facebook.com/sarpinz


Fri May 19, 2017 9:30 pm
Profile WWW

Joined: Sun Dec 22, 2013 5:53 pm
Posts: 107
Location: Melbourne Australia
Post Re: 3rd gear grinding. Worn synchro?
I didn't realise EI sold parts for C30x series Volvos, they don't have a section for them on their website.

The pinzgauer ZF SF5-13 and Volvo ZF SF4-13 share some common parts between them and synchro rings will most likely be the same part... https://www.pinzgauer.com/showdetails.p ... 101225101/ ...$28.50 (USD).
The synchro engagement hubs could also be interchangeable as well as some of the bearings. The main shaft, lay shaft and gears will definitely not be interchangeable. (Gears will swap between all SF-13 series gearboxes but ratios will differ). Gear shifter setup is also different.

Gear oils with a rating GL-5 or higher will cause premature failure of synchro rings, I would also recommend the use of Redline MT90 gear oil in the gearbox and T-case.

On a final note when I was checking parts availability and cost for my pinzgauer gearbox I went directly to ZF and found that they were able to source parts for the SF5-13, however their prices were high so I didn't end up dealing with them.

_________________
1985 pinzgauer 712K factory 2.7lt civilian (RHD, 4 door K)
1979 Volvo tgb 1314a (under construction to om606 diesel/722.6 trans. Dual cab/tray)


Sun May 21, 2017 9:00 pm
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 8 posts ] 

Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.