I need oil cooler return pipe (bottom) - NBD4510BB, which is no longer available. What are my options for repairing it, ideally "in situ"? Do I really need to remove the transmission crossmember and driveshaft and lower the transmission to replace the line?

I am contemplating either getting a used line or somehow converting the existing line to AN fittings. I read that replacing the line requires removing driveshaft, trans crossmember, removing shifter and lowering the trans. Is this indeed the case?

Does anybody here have experience with "improvised" repairs like flaring the hard line converting to AN lines? Hotrodders and swappers seem to be doing these kinds of things, but I have no first-hand experience. What kind of fitting do we have on the radiator for the trans cooler anyway? Should I look into an aftermarket trans cooler while I am at it?

 

Can you take a picture of where the lines go into the GM transmission ?

If I recall the GM transmission was redesigned through the X300 production years and has a Orange dot and the lines at the transmission where different

See TSB below

08-2-03 (jagrepair.com)

 

try to carefully cut the crimp and replace with rubber hose over the existing flare. if that fails cut cut it straight, slather hi tack sealant and double clamp the hose. wait 20 minutes and it is permanently bonded.


AN compression adapters really aren’t needed

 

Tube wire wrap around brazing as a repair for middle of the tubing ?

 

Thank you very much for sharing this, I appreciate it. The TSB talks about 4L80-E for the 6 liter v12 model. I know that XJR also uses 4L80-E transmission. Do you know whether this also applies to XJR?

I looked at the parts catalog on jaguarclassic nd my interpretation is that the lines are the same 95-97:
https://parts.jaguarlandroverclassic.../brand/jaguar/
oil cooler return pipe (bottom) - NBD4510BB
oil cooler output pipe (top) - NBD4500BB

The part numbers for the v12 version are different from XJR (NNA4500BA and NNA4510BA):
https://parts.jaguarlandroverclassic...e=C50442665011

Oddly enough the catalog does not mention differences for the v12 hoses either. May be they have enough reach to work with either version of the transmission?

 

6.0 v12 and xjr transmission is the same. aj16 uses an adapter plate to fit

 

Check against this vendor

Genuine Dipstick And Oil Cooler Pipes-4.0 Litre-supercharged (4.0 Litre Supercharged,automatic) For Jaguar Xj 1995 - 1997 (from 720125 To 812255) Classic | Jaguar Land Rover Classic Parts

 

Check a transmission shop , they may have a go to for line / pipe repairs

Where is your damage ?

 

Sadly, the NBD4510BB is listed as no longer available, which is the one I need. They have NBD4500BB, which is the one I don't need.

 

Do you have a bad fitting or a line hole leak ?

 

My damage is at the fitting that screws into the radiator. The pipe and the nut were rusted together. I tried every trick including Kroil and heating. Unfortunately as I was undoing the nut the pipe twisted and broke. If I had the end that screws into the radiator and a piece of pipe sticking out of it, I could probably fabricate a joint using flare nuts and a flare joint. I dislike compression fittings, but they could be used as well. Where can I get something that screws instead of the trans cooler line into the radiator?

 

Bad fitting.