Cruise Control Fail above 40mph: need Sherlock Holmes help!
Seeking Answers/Ideas: 1996 E-350: Cruise Control fails above 40mph.
1. Over last 3 years, since we picked up our Beast, speedometer has always bounced some at Hwy speeds, and cruise worked fine up to 95+mph. Does your speedometer bounce at all (is this normal)?
2. Fall 2017: Cruise suddenly stopped working at higher speeds and a periodic tranny down shift and back to up shift started occurring over 70mph but not always. Been here? Solution?
3. Story&Question: It’s been at my local Ford dealership for approximately 6 months total (2 periods: we took it back for a couple week summer trip) with the request to fix the cruise control and told them of the periodic shift down/up at high speeds. They said they’re unrelated. In these months in the shop, they repaired and/or rebuilt the speed cluster 6 times, confirmed all electronic/wiring is good, did something in the rear axle, and ultimately made no improvements (cost me $1,300 in parts and they covered labor: FWIW we think they also damaged a ring too because we started leaking at the end of our trip and the mechanic later told me his apprentice may have damaged it on install: ug! ...another $1,500 rebuild in a shop). Ford demands the cruise on steering wheel was aftermarket. 1st owner was oil field (100,000mi), 2nd owner (miles 200-300,000) says cruise and wheel were always in it. I don’t think it makes sense: looks same, etc. What else can I consider and try? Is cruise and tranny linked? One old mechanic friend says it may be a tranny sensor. I’m 100% ignorant.
Ok all you Sherlock’s and all you consumers who have been as unfortunate as I, what next?!?!?
Thanks!!!!
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