View Single Post
Old 05-18-2021, 10:31 AM   #47 (permalink)
ksa8907
Master EcoModder
 
Join Date: May 2012
Location: Tampa, FL
Posts: 1,745

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 206
Thanked 420 Times in 302 Posts
Quote:
Originally Posted by Hersbird View Post
Not to make excuses for Chrysler, but no minivan transmission was worse than the Honda Odyssey. Once they made the Honda a real minivan with sliding doors, then stuck a V6 in it, it made the Chrysler transmission seem like a dream.

We once thought we were having a failed transmission on my dad's 150k mile 90's Caravan but come to find out the independent transmission shop had flushed it with general spec GM fluid from the time period about 6 months prior. It even said that fluid was acceptable on the dipstick. I guess acceptable for an emergency because once we switched it back to whatever AT3 Chrysler specific fluid was right, there was never a problem again past 200,000 miles when it was sold. I can't imagine how many transmissions were rebuilt those years when really all they needed was a fluid change back to the correct fluid. Similar story on that 2000 we had, started not shifting correctly, but a Jeep dealer of all places was able to just fix a under $200 speed sensor and we never had an issue again. I always wondered if a less honest shop would have just thrown a $1400 transmission at it becuase of the poor reputation they had.
I also am not defending Chrysler, they generally have nice vehicles but fall short in some fashion...

HOWEVER, their reputation for bad transmissions in the 90s is not entirely their fault. Chrysler designed a different spec ATF, higher temperatures iirc, but most shops were completely clueless about it. Toss in the fact that their transmissions also greatly benefit from an aftermarket fluid cooler that is not standard equipment...

Chrysler engines and transmissions are very optimized, that is, most amount of power possible while remaining reliable. Unfortunately, that means for the transmission there is little headroom to allow harsh environments. In the vans, they're pushing 300hp into a 5000lb vehicle through a trans the size of a beach ball/basketball...

Notice how police spec vehicles have larger coolers, oil pans, brakes, fans, etc.?
__________________





Last edited by ksa8907; 05-18-2021 at 12:17 PM..
  Reply With Quote
The Following User Says Thank You to ksa8907 For This Useful Post:
Hersbird (05-18-2021)