Overdrive question

Clutch, Gearbox, Overdrive, Propshaft, Differential, Drive Shafts, Hubs.
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Joe Wright
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Overdrive question

#1 Post by Joe Wright » Fri Jun 19, 2020 6:30 pm

Hello everyone. I've got a 1973 2000, not sure what overdrive unit it has in it I'm afraid. Just wanted to know is it normal for it to take a while for the overdrive to lick in when the car is cold?
Works perfectly when the car is warmed up but not at all straight after start up? Is this normal?
Probably takes a mile or two to get it going. No major drama just curious.
Thanks in advance
Joe

tony
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Re: Overdrive question

#2 Post by tony » Fri Jun 19, 2020 8:50 pm

Suggest that you give it an oil change and see what happens .
Tony.
1976 2500 TC. converted to S specs.

Lots of bits

1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.




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johnnydog
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Re: Overdrive question

#3 Post by johnnydog » Fri Jun 19, 2020 11:23 pm

Even just a check of the gearbox oil level, without a full oil change, topping if necessary, could well improve the overdrive engaging. A low oil level is one cause of sluggish engagement.
An A type overdrive tended to have a harsher and more sudden engagement, whereas the J type were more cushioned and arguably smoother.
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1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
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Clifford Pope
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Re: Overdrive question

#4 Post by Clifford Pope » Sat Jun 20, 2020 6:02 am

It's worth doing a proper oil change, and cleaning the filter.

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Re: Overdrive question

#5 Post by Joe Wright » Sun Jun 21, 2020 7:53 am

Great.
Thankyou ever so much. I will give it a go.
All the best.

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Re: Overdrive question

#6 Post by Ronald » Mon Jun 22, 2020 7:41 am

If it is a J-Type overdrive with the oblong, finned bottom plate (6 screws hold it in place) just remove it (after you have drained the transmission of oil , but beware of getting a faceful of oil when you you are doing that!) Take out the filter and clean it. Ensure the gasket is intact or make a new one, and reassemble. Not sure if the earlier A type overdrive with the circular bottom panel is the same.

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Re: Overdrive question

#7 Post by Joe Wright » Thu Jul 02, 2020 4:54 pm

Thankyou. Overdrive was looked at only a few thousand miles ago so I'm hoping its something straightforward

tony
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Re: Overdrive question

#8 Post by tony » Fri Jul 03, 2020 4:29 am

What grade oil are you using? Just a thought.
Tony.
1976 2500 TC. converted to S specs.

Lots of bits

1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.




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Joe Wright
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Re: Overdrive question

#9 Post by Joe Wright » Tue Jul 07, 2020 6:53 pm

Not sure. I haven't had the car long so haven't changed the oil yet. It's going in on Thursday so I'm going to ask for an oil change GL4 I think I have to use and fot the filter to be cleaned out. Fingers crossed it makes a difference.

Mike Stevens
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Re: Overdrive question

#10 Post by Mike Stevens » Fri Jul 10, 2020 8:13 am

The original oil spec was EP90 (as also used in the diff) but these days you tend to get EP80/90 which seems OK.

I wonder how you got on yesterday?
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