Is the noise at 2,700 rpm? Mine too! Different tranny though so I'm not sure if it is the same or not. Just started noticing mine a few thousand miles ago.

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'97 F150 Lariat, Flareside, white/sliver, SC, ORP, 5.4 (FQR 8/99) running Mobil 1
Mods: 305/70/16 GY ATS, AR Baja wheels, dual exhaust, Smittybilt Nerf Bars, Edelbrock IAS Shocks, K&N Filter, Carbon Fiber Bug Gaurd and rigged the fog lights too.

www.fseries.com

Transmission Whistle ?
 

I have a whistling sound coming from my auto-transmission when at about have trottle shifting from 2nd-3rd gear. It goes away after the gear change, But when the tranmission downshifts at a specific trottle/gear if whistles again. It's an on & off type whistle, almost like something is slipping but I can't feel anything slipping. I took it to the dealer and they heard the noise but could not identify the source. I have 33k miles on the truck and warranty runs out in 3k. Any suggestions ?

98 F150XLT XCab 4.6L Auto

I have a whistle at about the 1700 rpm range. If you hold the throttle at that range it stays. Accelerate and it goes away. It doesn't seem to hurt performance or anything, it is just anoying. By the way, mine is a 5.4 Thanks for the help.

I had a whistle from the transmission in my 97 Explorer. When I was stopped and in gear it would whistle, but I soon as I hit the gas it would go away. Dealer said it was some sort of loose plate in the tranny and they fixed it for $240. I found a TSB on it at "alldata.com". They list all the TSB's for any car or truck for about the last 20 years. Hope this helps.

One things for sure JPR, they will find out the reason in 3100 miles! https://www.f150online.com/f150board/smile.gif

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97 F-150 SC Lariat, Styleside, White over Gold, 4.6L (Windsor), Automatic, 3.55 rear end, electronic 4X4, w/ every option of Lariat and ORP packages except the 17" wheels (I even got the OR decals now!) MOD's so far: K&N air box mod, Gibson Super Truck, clear Bugflector II, Leer TSC 600 hard cover, Bridgestone Dueler OWL ATP 265/75 R-16's, TrailMaster Invader N7 shocks, Smittybilt step bars, Ford moulded mud guards, "White-white" head lamps, Cloud Rider Design's SS Grill and bumper opening, Bosch Platinum + 4's, Hayden 30K+ Tranny Cooler,Class III Reece load distributing hitch system, full wiring including trailer battery charging system, Escort Sensor II Brake controller, Superchip :)

Anybody get an answer to this question????

After more than 10 years, I doubt it........