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Old 11-06-2021, 04:10 PM   #1
baccara1
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Default M46 j/p type overdrive versus p type

Hi
I currently have a 1988 740 with a j/p marked overdrive.
I have a newer p type and am wondering if it would be compatible with the existing m46.

It looks identical from the exterior.

Many thanks

Andrew
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Old 11-06-2021, 04:19 PM   #2
hiperfauto
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I don't believe you can stick a P type OD on a trans that has a J or J/P type. From what I understand the output shaft of the transmission is larger for P type OD's.
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Old 11-06-2021, 05:51 PM   #3
baccara1
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Many thanks for the info
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Old 11-13-2021, 03:03 PM   #4
sbabbs
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ONly J/P marked overdrive on m46 I ever saw was on a 16v car. I don't know the size of the shaft hole is but yeah P has bigger shaft hole then J. Curious what the P/J size shaft hole is.
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1988 245 White slicktop M47 Wagon! 93 b230f. LH 2.4 STS flat flywheel.
1990 745 B230FT Getrag JohnV flywheel 240mm clutch 13c A-cam 3.54 G80 548K
1991 740SE B230FT NPR Strut braces IPD bar A cam 550cc EV14's. 3.73 G80 M90 to put in.
1995 940 White racing wagoon. 13c m90 to put in
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Old 11-14-2021, 09:41 PM   #5
745T+
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Quote:
Originally Posted by sbabbs View Post
ONly J/P marked overdrive on m46 I ever saw was on a 16v car. I don't know the size of the shaft hole is but yeah P has bigger shaft hole then J. Curious what the P/J size shaft hole is.
That was at the old north Portland U-Pull It. You pulled the flywheel, and left the transmission. It went into my son's car, and was functioning perfectly when it was replaced with an M90. M46 transmissions have become scarce. They were plentiful 5-20 years ago.
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Old 11-15-2021, 01:19 PM   #6
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Yes I remember it was you got that. I still have that other m90 I got from you, still gotta put it in one of these junkers one of these days
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