Clunk when accelerating

[larshell]

How do I flash O/D?
No cel as of now.

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[Zap Rowsdower]

The Rowsdower mobile is experiencing this same issue.
I personally do not have a check engine light or the overdrive flashing while I'm experiencing this.

 

[larshell]

Oh i get it.
No O/D flahing and Cel here also.

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[SailorKane]

I have the same issue. Clunk when accelerating. Its happening at a downshift and getting more pronounced as time passes. Original tranny fluid and filter. 120,000 miles on truck. Getting mixed opinions as to whether I should change the fluid at all. Some experts say I shouldn't do it, it might cause tranny to fail in a few thousand miles. Others say it shouldn't hurt. What is the TSB that Ford issued on the tranny? Change to Mercon V?

 

[1997SCEBFEX]

I have the same issue. Clunk when accelerating. Its happening at a downshift and getting more pronounced as time passes. Original tranny fluid and filter. 120,000 miles on truck. Getting mixed opinions as to whether I should change the fluid at all. Some experts say I shouldn't do it, it might cause tranny to fail in a few thousand miles. Others say it shouldn't hurt. What is the TSB that Ford issued on the tranny? Change to Mercon V?

I trailered a lot in my Expy's earlier days, thus changed the filter/fluid every 25K in addition to the oversized trans pan.

Q: What does you fluid look/smell like on the dipstick? I'd venture to say you're well beyond service life. I could be wrong, but with the hundreds & hundreds of heat cycles you've had on the life of the trans....time to change it out IMHO.

MERCON V is the latest fluid for these trannies.

PanHandler.

 

[larshell]

I don't have this clunking issue until change my oil. After few thousand km there it is.
I have it scanned at dealership there is VSS error any suggestion guys. Thanks!

 

[Zap Rowsdower]

Took the Rowsdower mobile into the stealership this morning and had the transmission fluid changed along with a new filter. On the drive home I didn't notice clunking when I accelerated.
I hope that solved the problem.

 

[SailorKane]

My fluid is slightly brown.
Rowsdower, please give update when you have some more miles on the vehicle. It is encouraging right now, however.....

 

[Zap Rowsdower]

My fluid is slightly brown.
Rowsdower, please give update when you have some more miles on the vehicle. It is encouraging right now, however.....

Understandable. I'll follow up in a week or two.
However, if I happen to forget. No news is good news!

 

[Zap Rowsdower]

It’s already been almost two weeks and I haven’t noticed the problem anymore.
I have to say it was a little pricey getting the transmission fluid changed at the dealership but considering I don’t have to deal with that clunking when I accelerate anymore, it was worth it!
-Rowsdower