Shifter guide plate, an often ignored small part

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
Greendot319
G-Major
G-Major
Posts: 827
Joined: Sun Aug 31, 2014 1:05 am
Location:

Re: Shifter guide plate, an often ignored small part

Post by Greendot319 » Fri May 07, 2021 9:03 am

You're doing some good work on the forum Yves!
Better rough than Repro


User avatar
YLG80
G-Lieutenant General
G-Lieutenant General
Posts: 4095
Joined: Fri Aug 05, 2011 9:45 am
Location: near Namur, Belgium
Contact:

Re: Shifter guide plate, an often ignored small part

Post by YLG80 » Fri May 07, 2021 9:11 am

Greendot319 wrote:
Fri May 07, 2021 9:03 am
You're doing some good work on the forum Yves!
Thanks for the kind words.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794

Mike Wright
US Army Major (Ret)
US Army Major (Ret)
Posts: 1930
Joined: Sat Dec 14, 2002 6:52 am
Location: Owasso, OK

Re: Shifter guide plate, an often ignored small part

Post by Mike Wright » Tue May 11, 2021 9:03 pm

Excellent info Yves :!: Thanks also to CL and BK :!: :wink:
Mike Wright
SEEKING MOTOR # GPW 2636
MVPA# 4341
GPW 2636, DOD 28 FEB 42, Reg# 2055811 (est)
GPW 104331 DOD 31 MAR 43, Reg# 20369321 (est)
MB-101008 DOD 27 NOV 41, Reg# W-2032462 (Original)
MB 438075, DOD 1 MAY 45, Reg# 20704591 (Original)
Converto ABN Dump 0886168
M2-HB gun trailer

User avatar
YLG80
G-Lieutenant General
G-Lieutenant General
Posts: 4095
Joined: Fri Aug 05, 2011 9:45 am
Location: near Namur, Belgium
Contact:

Re: Shifter guide plate, an often ignored small part

Post by YLG80 » Wed May 12, 2021 9:01 am

bryanbdp wrote:
Wed May 05, 2021 5:51 am
Can someone explain how being worn affects popping out of gear? Mine pops out only under deacceleration. The plate was replaced with a new one, the theory right now is the slots aren't deep enough for positive engagement of the shift rail balls.
Hi Brian,
The worn shifter guide is not the only reason the have a 2nd gear popping out under acceleration or deceleration.
Especially, if you have a new plate :wink: .
May I advice you to open a new thread on your specific issue.
There are several previous discussions about that issue in the forum when it comes for the T-84 itself.
Perhaps that thread would give you a clue : viewtopic.php?t=291144
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794

User avatar
YLG80
G-Lieutenant General
G-Lieutenant General
Posts: 4095
Joined: Fri Aug 05, 2011 9:45 am
Location: near Namur, Belgium
Contact:

Re: Shifter guide plate, an often ignored small part

Post by YLG80 » Fri May 14, 2021 2:31 am

Interesting information collected in the French forum vehiculesmilitaires.com, where I have also shared that post in French:

Hot or cold
A metalworker with a lot of experience advised me to rather use domed rivets inserted from outside and stamping the rivet hot to take profit of the cooling shrinkage.
This gives a much better aspect from the outside and an improved shear strength, which is one of the goals.

What is also interesting is that this particular process was used in an M201 gearbox cover likely during an overhaul by the Army, as shown by the next photos published by an M201 owner(I can read Clermont-Ferrand on the gear box cover data plate)

Perfect rivet aspect
M201 rivets gearbox_cover 1.JPG
Stamped from the inside then ground flush to the plate surface.
M201 rivets gearbox_cover 2.JPG

I do not wand to restart a discussion about hot or cold riveting.
This has been covered in many, many other topics :wink: .
For example here : viewtopic.php?f=4&t=79308&start=15

To me and only personally, as an engineer (ouch in electronics :oops: ), I find that interesting, considering that cold stamping was made mostly for economical reasons in the industry.
It's extremely expensive and time consuming to stamp hot rivets.

As an individual restoring a gear box cover, I'm not sensitive to that economical aspect.
I'm just interested in the best result on the long term.
And for a short rivets like that, the risk to generate the "diabolo effect" after shrinking, with the associated weakness, is pretty close to zero.
And the risk to have a moving guide plate after a while is also nearly zero.
poor-riveting-2.jpg

The risk to generate this effect is also very reduced due to the short length.

poor-riveting.jpg

Just wanted to share that information.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794


Post Reply

Return to “MB GPW Technical Knowledge Base”

Who is online

Users browsing this forum: No registered users and 39 guests