Bristol Cars - Owners and Enthusiasts Forum  

Go Back   Bristol Cars - Owners and Enthusiasts Forum > Bristol Forums > 6 cyl Bristol cars

6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc

B400 - gear box oil - modern equivalent

Reply
 
Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 27-05-19, 07:12 AM
Member
 
Join Date: Jun 2018
Posts: 68
Default B400 - gear box oil - modern equivalent

Yesterday the first ride over a distance with 100 miles happend. The weather was not hot but at the end there was a stop an go situation during several minutes. After that is was nearly impossible to shift the gears. After a break of oner hour the car returns to normal behavior. I don't know what kind of gear box oil is filled in.

What kind of oil is a good recommendation for my situation?
Reply With Quote
  #2 (permalink)  
Old 27-05-19, 11:05 AM
Member
 
Join Date: Jul 2008
Location: Sydney, Australia
Posts: 406
Default

Bela ,
Do you know the history of this gearbox .
Was the gear lever and top of case changed at one time . What lever is fitted?
What is the gear box number stamped on the right hand side of the case?

I had a similar problem with a gearbox that had a remote shift top fitted to
a long lever box . On the bench it changed perfectly but after use when the box reached operating temperature I had trouble moving the gear lever .
The three piece gear case during manufacture has the three selector rod holes either line bored or reamed to give a perfect fit for the selector rods.
Changing the top will mean that they are unlikely to be in alignment .

A change of grade of oil will not fix the problem .
For non overdrive boxes I use a 10W/30 mineral oil (SAE30 was recommended originally) .
I have used a thicker oil 20W/60 in the past and found the syncros slow until the box and oil warmed to operating temperature.
I'm not sure of the recommended oil for your overdrive. Get advice from the person you bought the overdrive from .

Geoff
Reply With Quote
  #3 (permalink)  
Old 27-05-19, 07:22 PM
Member
 
Join Date: Jun 2018
Posts: 68
Default

Quote:
Originally Posted by Geoff Dowdle View Post
Bela ,
Do you know the history of this gearbox .
No

Quote:
Originally Posted by Geoff Dowdle View Post
Was the gear lever and top of case changed at one time . What lever is fitted?
Yes - a remote is fitted. I don't know if the top of the case must have been altered therefore. I don't know the source.

Quote:
Originally Posted by Geoff Dowdle View Post
What is the gear box number stamped on the right hand side of the case?
At the moment the car is not in an place where it can be lifted.
Reply With Quote
  #4 (permalink)  
Old 11-07-21, 04:58 PM
Member
 
Join Date: Jun 2018
Posts: 68
Default

Quote:
Originally Posted by Geoff Dowdle View Post
Bela ,
...
What is the gear box number stamped on the right hand side of the case?
I'd compared the gearbox with the drawing in the WSM and it seems original.

I found 4 stamps:

unit N? 45?2631

S?TD

26 kp

WM 645

"?" is an estimation regarding to bad angle of view
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT. The time now is 05:26 PM.


This is the live site

Search Engine Friendly URLs by vBSEO 3.6.0 PL2