BW65/66 clarification

XJ
1

I understand the Borg-Warner model 65/66 transmission was fitted to the 1980-1987 XJ6.
I have what I’m led to believe, is a BW66 from a 1984 Series 3 XJ6, but the BW ID tag is missing on the LH side.
All I have to identify it are the casting numbers MCC 04 65065900 Z & a tag on the RH side stamped 42995.
So, do I have a BW65 or BW66?
There are two sets of digits in there which would suggest it’s a BW65

What was the last year & series of XJ6 that used a BW65?

Appreciate feedback
Cheers
Pierre

2

only info i have is late as 86, i do have a pdf parts list of 65/66 box

4

An '86 would almost certainly be a 66.

Check the end of the dipstick. It will be stamped 66 or 65.

Rob

5

The BW66 is supposed to have the DEEPER PAN.

6

Thanks Robert/motorcarman/Tom, here’s the situation. I have what I’m led to believe is a BW66 from a known 1984 series 3 XJ6. It came with no dipstick & the ID tag was missing. The only refs I have are the casting numbers mentioned in the previous post.
If the depth of the pan is the only other external difference, can someone give me a height of a BW65 or BW66 pan & I can check that measurement.
I plan to swap my DG250 auto out of my MK2 for this unit.
regards
Pierre

7

i’ll send off soon…also remover you email addy now, always try message email info

8

Correct…

Further development of the Model 65 resulted in the introduction of the Model 66, which is designed for even heavier duty or for a higher level of durability in cars at the upper end of the market range. The shafting has been strengthened, and the lubrication system improved by fitting a deeper oil pan and enlarging some of the ducts. Externally, however, the dimensions remain the same.

1 Like
9

The BW 65 can be fitted with the deeper oil pan so THAT is not a definitive clue as to whether it is actually the updated gearbox.

If it was fitted as built, the shallow pan is the BW65.

10

Thanks for the replies Guys, I know the BW66 has a deeper pan, but I need a height measurement of a BW66 or BE65 pan to determine what I have with no dipstick or ID plate!
Pierre

11

The BW66 was fitted to S3 cars, Pierre - so unless a PO has done something, or you are misinformed on ‘your’ model year; an 84 should have the 66…

Frank
xj6 85 Sov Europe (UK/NZ)

12

message sent

13

Received your pdf file Tom, thank you.
OK, Frank thanks
Pierre

14

Here’s another twist, the bell housing has (2) bottom openings which I assume are both for stone guards, yet the Sparts Parts Listings for BW65/66 only show (1) stone guard for the bottom & (1) at the top?
Pierre

15

IMG_0534
IMG_05341920×1440 380 KB

16

my bw 65 has 2 at the bottom

17

Tom. Do they both have stone guards fitted?
Pierre

18

yes both fitted but the expected damage

19

Guys, I’ve had it confirmed by a reputable English Jaguar auto trans specialist that the BW65 sump depth is 30mm and the BW66 sump depth is 48mm.
I now know I have the BW66 tranny.
I have the rear mounting bracket from the Series 3 XJ6 BW66 & I’m hoping this can be made to fit on the 1960 MK2 3.8. Will trail fit this week.
Cheers
Pierre

21

David, good luck,
Rob

22

I have a plethora (lot of the BW 65 or 66) and they are available and reasonable…plus have a 1986 xj6 virtually complete for parts…
Mitch in Phoenix and Colorado