That is a lot of weight for the XJ. You can still tow stuff tho. Install a large trans cooler after the stock cooler. Install a trans temp gauge and keep it out of overdrive while towing.

 

So, you didn't drain it yet?

See how your road test goes. Might wanna do a couple of drain and fills just to be safe.

 

Bingo. Grossly overloaded and uphill. Trans overheated, fluid expanded, and be glad the whole thing didn't go up in flames.

Cold water on a hot engine is a good way to crack a block.

I don't have much hope for your transmission. See my sig, #3. It's worth a shot.

 

It's not that uncommon. Gets hot enough to boil, and it's all over.

 

It does happen frequently, when fluid is old and low pulling too much weight up hills.

I bet that AW4 survives just fine.

 

They are just fine if you stay within reasonable limits. I have towed that much weight with no problem, but not at that speed.. I also kept it in 3 to keep it from thrashing back and forth from 3 to 4.


If you need to tow on a regular basis, install a transmission cooler.


Take Cruiser's advice and do several drain/fill cycles, or better yet, see my sig, #3.

 

I had to read the whole thing.... just wow... never knew of an XJ pulling that much combined weight. It's an Aslin...not an Allison, LOL....
But it does go to show just how much of a lickin' these old XJ's can take and keep on tickin'.

 

I think is asian warner bro

 

Both you bros.

It's Aisin-Warner

 

The history of the joint venture between Aisin and BorgWarner is a bit convoluted. Their current name is Aisin AW

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https://en.wikipedia.org/wiki/List_o..._transmissions

Aisin automatic transmissions are manufactured by Aisin Seiki and Aisin AW, formerly known as Aisin-Warner, and which was established in 1969 as a joint venture between Aisin Seiki and BorgWarner. The joint venture terminated in 1987. While Aisin Seiki manufactures a variety of automotive components including automatic transmissions for heavy duty vehicle applications, Aisin AW manufactures automatic transmissions for light vehicle applications, including hybrid electric vehicle powertrains, as well as NAV Radio.

As of 2005, Aisin AW surpassed General Motors Powertrain Division as the largest producer of automatic transmissions in the world, producing 4.9 million units, with a market share of 16.4% of the global market for automatics. Toyota Motor Corporation and Aisin Seiki are the two major shareholders of Aisin AW, with 51.9% and 42% respectively. Aisin AW, which was set up to be the sole source of RWD automatic transmissions to Toyota, subsequently developed FWD/AWD automatic transmissions. Aisin, as one of the major Toyota group suppliers, shares many designs and development activities with Toyota. See Toyota A transmission for a complete list of Toyota/Aisin models. Aisin AW supplies automatic transmissions to 55 automotive manufacturers around the world, virtually every major OEM. These include General Motors, Ford, Jeep, Mitsubishi, Nissan, Saab, VW, Volvo, Hyundai, MINI among others.

 

I get half credit.. I was close.. lol... at the end of the day... I'm just glad we've got a setup like we do in these old Jeeps. Seems like so many vehicles are made like complete dog poo that it's rare to find this combination of reliability/longevity.

 

If the manufacturer can save $5 per unit it is totally worth it to ship a product that will die in three to five years as opposed to not saving that $5 and shipping a product that will last 40 years.

 

Both of you! To the woodshed!

 

I remember reading an article somewhere years back that I remember it being a reputable source.... this came out and don't think they wanted to see it public...but anyhoo
That Chevrolet was having a serious issue with a model of transmission that went into several of their vehicles (trucks)... they were inhouse testing them for production and found that they would fail right around the 100k mark requiring a full rebuild.

They secretly went to Toyota and asked them if they sent them the technical plans would they build one for them. Toyota agreed. Built and sent the trans to Chevy.... they put it on their testing platform...and ran and ran it and could NOT get it to break.
They called Toyota up and asked them what did they do differently because it would not break after hundreds of thousands of simulated miles.
Toyota's response was.... We built it to your specifications.
There's the difference between Toyota quality and US automakers... it's not the design that was bad... it was in the process of how it was made that caused it to fail. In Japan for Toyota... if a part is made and not correct, it gets rejected. If a part in the US gets made for a vehicle, if it's not perfect but within tolerance it gets used. Toyota doesn't use that philosophy....
I'd say the end result it pretty clear. Toyota will spend the extra 5 bucks or whatever it takes to build a quality product.

 

Easy there brother... what's with all the hostility? lol