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#1
12-27-2015, 09:34 PM
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Ford F-350 rear end clunk
My son out in CA called me about this. He has a '99 Ford F350 that has a severe clunk in the driveline when shifting into gear. He said he has a little vertical slop in the pinion (up/down) of the rear end,and some slop in and out of the pinion. Also he has a touch of slop up and down in the slip yoke. I told him if this was a GM rear,for sure it is junk,but-
OK,never having owned,or rebuilt a Ford rear end,I ASSUME this is no good,Correct?  He said he thinks it as a 10.5 rear,if that helps. Thanks.
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 ‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
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#2
12-27-2015, 09:54 PM
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Is the big nut tight? Has anyone recently put a pinion seal in?
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'68 GTO '69 Corvette '75 Cadillac Coupe Deville TOM |
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#3
12-27-2015, 10:20 PM
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Quote:
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‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
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#4
12-27-2015, 11:05 PM
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Just talked to him,he said he didn't know if the pinion nut is tight or not,and seeing as how I don't think the Ford has a pinion bearing pre-load/crush sleeve like a GM,I told him not to touch it until I find out more info on the Ford rear end set up.
Thanks for any help.
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‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
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#5
12-28-2015, 08:38 AM
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Clunk when put in gear can also be the U-joints.
Slop in/out is not good.
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Some guys they just give up living And start dying little by little, piece by piece, Some guys come home from work and wash up, And go racin' in the street. Bruce Springsteen - Racing In The Street - 1978 |
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#6
12-28-2015, 09:56 AM
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He said U-joints are tight.
I FIGURED the pinion slop was not good,but he said it's maybe just a few .001". Just not a Ford guru on this end. Thanks Boss.
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‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
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#7
12-28-2015, 03:53 PM
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U joints can appear to be tight, and still be a problem. Have they been taken apart, and inspected?
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be a simple...kinda man. |
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#8
12-28-2015, 04:24 PM
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Quote:
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69 gto ,all#match,467,th400,3:55 Easton posi,resto completed may 2016. 427 hp/530tq. Stump puller with stock#62 , stock intake and qjet Th400 gone. Tkx close ratio with .64 of 66 Pontiac Beaumont sport deluxe,BB 5sp tko 3:08 auburn 450hp 550 torque  wife sold it
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#9
12-28-2015, 11:00 PM
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Take it to a mechanic
All I drive are F350 Duallys ...
He needs to take it to a shop that has EXPERIENCE replacing rear differentials. It is not a " do it yourself " diagnosis or repair. Jim
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Click Here To See Where I Am Today |
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#10
12-29-2015, 11:48 PM
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hey gents (said son here),
Thanks for all of the input, ended up getting a new slip yoke from a local driveline shop as part stores couldn't even order the part and that solved the noises, the splines were extremely warn when i separated it due to a lack of grease, so it would bounce all over while coasting |
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#11
12-30-2015, 09:30 AM
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Johnny,I sent you to school for a reason. Always use proper punctuation, grammar,and check spelling.
Glad you figured it out.
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‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
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#12
12-30-2015, 10:08 AM
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Quote:
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