Does anyones know what type of transmission fluid can I use in my Jaguar XJ6 Series 1 4.2 year 1973? Dexron III....? The box is a BW 12
Best regards

 

Type "F" or "FA" is the usual recomendation to replace the original spec of Type "G"....which is an obsolete designation.

Many use Dexron in the old Borg Warner boxes and report no problems. Dexron is more "slippery" than F/FA, though. You might feel a softer shift wear meand more slippage and more wear.....which might be exactly what an old gearbox does NOT need :-)

Cheers
DD

 

Hello Doug,
Could you tell me a F or FA type manufacturer ? I cannot find it...

Thank you very much,

Best regards,

Javier

 

¿no hay fluido Tipo F en España? well if neccessary Doug will send you a box of Type F fluid.

 

Hola Jose,
I,dont know yet, I´ve been looking around in internet and I cannot find it, is not the same as Mercon, is it?
best regards,

Javier

 

Here in the 'States most or all the usual manufacturers offer it: Shell, Valvoline, etc

However, it's an older designation for older cars so not every retailer has it on the shelf at all times. In some instances I've had to request that the local vendor order some for me.

Cheers
DD

 

hola Javier!
it's called "Type F", not Mercon, not Dextron. I get it at automotive parts stores like Advance Auto Parts or Autozone, (Advance y Autozone son unas cadenas de tiendas de piezas de automobiles a traves de todos los Estados Unidos de America). My '65 S type uses "Type F" too. Me no understando la différence...they are all Red fluids.

http://shop.advanceautoparts.com/buy...smission-fluid

http://www.autozone.com/autozone/acc..._&target=shelf

http://www.quakerstate.com/#/product...-fluids/type-f

http://www.walmart.com/ip/Super-Tech...ype-F/16213434

 

also you might contact Autostorica in Barcelona, they maintain and service classic Jaguar:

Auto Storica -Coches clasicos y de coleccion

 

Modern ATFs are a lot more complicated but with the older types it's really just a matter of different additives to alter the friction characteristics.

For decades (it seems) there were basically just three, at least in the USA. "Dexron" for GM cars, "Type F" for Fords, and "......." (something else, can't remember) for Chryslers.

Cheers
DD

 

Type F also for Borg Warner DG250 (Studebaker / Detroit Gear 250, 1950, Jaguar Cars).

 

Right! I should have been more thorough in my answer.

In the 50s-60s , even early 70s Ford was using some auto transmissions that were of Borg Warner design/roots. The B12 was virtually the same as the Ford "FMX" which was used in millions of Fords. The BW65/66 and the Ford C4 are kissing cousins. The old "Ford-o-Matics" of the 50s were, I think, in the same transmission "family" as the BWs used by Studebaker and Jaguar.

Cheers
DD

 

the DG250 has a 3rd gear that's more like a 5th gear, like going from 1st to 2nd to 5th. ask me how I know. And to think there are people looking for these Stone Age transmissions amazes me even more. I suppose they were fine in 1950, but not 60 years later.

 

Some of the old design had strange operating logic.

Some started off in second and went to third...usually way too soon. Low/first gear required a floored throttle or manual shift.

Others (I think) went from from first to third and 2nd was a manual selection

Others had an "intermediate hold" switch to keep 2nd gear engaged no matter what....for climbing hills or whatever.

Nowadays we have 7 speed automatics with electronic brains :-)

I recall some late '90s Jeep with a 5 speed auto that had two "2nd gears". The brains decided which of the two would be used according to road speed, engine load, etc. If you were accelerating you'd only feel three shifts: 1-2, 2-3, 3-4. But there were actually five forward ratios.

Cheers
DD

 

yes, "Intermediate Speed Hold" Jaguar called it, in any case it should be called "2nd Gear Hold".

my S type has it with the DG250. you simply flip the switch to 'IN' and it prevents the DG250 from shifting to the Third "5th gear" around town and stop-n-go at red lights. It actually works good, primitive as it is.

I would be happy with a modern 4 speed automatic, (the XJ needs it too). The Third Gear is too lazy for driving around town, and too high for highway speeds.

 

Hello,
I´ve found a seller that has fluid type F.
Thank you all, I hope we will keep in contact.
Best regards,

Javier

 

Jose:

Understando???? Is that Spanish or Jalle? - -

One of my cars that I liked best was a 59 Ford Galaxy with Cruisomatic. A tad better than Fordomatic. Both BW's or very closely related. In the Cruise, one could let it shift to secon automatialyu, then manually place the lever 1 and it would stay in second. Lots more ooomph than letting it slip into 3rd.

Much later, we bought two year old lease return fromn the AMC dealer. A 70 Hornet. Actually A Rambler in a somewhat sporty skin. It had the AMC 232 CI six. A very solid and peppy engine. It had a BW auto trans, It was more than OK, The next year 6they went to MOPAR, a far better unit. The Hornet took all a teener could deal out and left running just fine. It could surprise many a SBC!!!

 

tremendo coche primo, y tu no te quedas atras! jaa! (bromas). Good to hear you found the Type F transmission fluid.

 

Spanglish !