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EFV-8 Club Forum / General Ford Discussion / Vibration in new drive shaft, maybe

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Posted By Discussion Topic: Vibration in new drive shaft, maybe -- page: 1 2 3     TomO 04-22-2011 @ 7:31 AM reply profile send p.m. Senior Posts: 7244 Joined: Oct 2009 37RAGTOPMAN, I have never seen a drive shaft for a 39 or 40 Mercury that did not have the pinion gear pressed on the shaft. All of the parts catalogs list the drive shaft sleeve only for the 41-48 Mercury. If you have a longer 10 spline sleeve, it is an after-market unit. Tom 37RAGTOPMAN 04-25-2011 @ 9:07 AM reply profile send p.m. Senior Posts: 1942 Joined: Oct 2009 TOMO yes the pinion is one piece that has a short 6 spline shaft and the coupling is what attaches to the drive shaft, this is on the SIX SPLINE,not the 10 spline, the longer coupling is what makes the difference between the FORD and MERCURY drive shafts in length, atleast 1939-1940 MERCURYS, I bought some parts from a man that restored a 40 conv,and noticed the longer coupling, compared to the shorter FORD coupling, hope this clears this up 37RAGTOPMAN TomO 04-25-2011 @ 10:50 AM reply profile send p.m. Senior Posts: 7244 Joined: Oct 2009 I think that you misunderstood my post. Ford did not supply the drive-shaft or the pinion for the Mercury as a separate part, like they did for Ford in 1939 and 1940 and Mercury from 41-48. The pinion is pressed directly on the 4 inch longer drive-shaft and was sold only with a matching ring gear. There is NO sleeve on the Mercury drive shaft in 1939 and 1940. A 4 inch longer sleeve would have to be an after market item, not a genuine Ford part. Tom MOXIE 04-25-2011 @ 11:05 AM reply profile send p.m. New Member Posts: 102 Joined: Oct 2009 Just sticking an adaptor on a shaft and welding it usually doesn't work. In talking to Mike, basically that is all he does. That is chuck the shaft up making certain with a mick it is true and round, bore out the old insert and press in the new and weld. Mike said he does not balance because the drive shaft does not need it, which I agreed supereal 04-25-2011 @ 12:59 PM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 We don't balance it, as such, but we do run it up in the lathe to check for any wobble. If we find any, we then correct the problem. As mentioned earlier, the primary cause of altered driveshaft vibration is the mismatch between the inside and the outside of the adapter. Most are foreign made, which likely accounts for the discrepancy. 37RAGTOPMAN 04-25-2011 @ 1:12 PM reply profile send p.m. Senior Posts: 1942 Joined: Oct 2009 I guess then ,,that the guy Had some FORD parts mixed in,with the MERCURY parts. I know that the drive shaft housing was longer and it had a matching solid driveshaft with the longer 6 spline adapter,. and I thought it was for a MERCURY, but maybe a later 42-48 FORD, and not a MERCURY. so I assume the pinion drive shaft were on piece and were the entire length of the drive shaft housing,must be hard to work on, 37RAGTOPMAN This message was edited by 37RAGTOPMAN on 4-25-11 @ 2:17 PM 37RAGTOPMAN 04-25-2011 @ 3:13 PM reply profile send p.m. Senior Posts: 1942 Joined: Oct 2009 According to the Green FORD book. part number 48-4605-A DRIVE SHAFT was hollow and used the 10 spline pinion, and was used in 1935,1936,1937,1938 yet another drive shaft was used with the part number 68-4605-B and had the solid drive shaft and was 6 spline and was used from 1937,1938 1939 1940,1941 so there is a overlap,though the years, also driveshaft 11-A 4605-B was 67 3/4 inch long and was used on FORDS 1941 to 1948 so in 1941 there was also 2 different lengths to the drive shaft,according to the GREEN BOOK, this is on page 134 in the FORD GREEN BOOK, one thing you can count on,Do not count on anything, Hope this helps. 37RAGTOPMAN TomO 04-26-2011 @ 9:11 AM reply profile send p.m. Senior Posts: 7244 Joined: Oct 2009 P/N 68-4605-B was used on 112" wheel base vehicles with torque tube in 38-41. 11A-4605-B was used on the 41-48 passenger cars (both Ford and Mercury). The Green book does not cover Mercury. There is a separate 1939-1948 Mercury Chassis Parts catalog that shows parts used on the Mercury. So, yes there were 2 lengths of drive shafts used in 1941. The Sedan Delivery, Panel Delivery and pickup with the 112" wheelbase used the shorter drive shaft and the passenger cars with the 114" and 116" wheelbase, used the longer drive shaft. Tom SDExpoman 04-27-2011 @ 10:15 AM reply profile send p.m. Member Posts: 47 Joined: Oct 2010 Since were on the topic of drive shafts. My '37 half ton has a cowbell ringing sound coming from the underside. I have tightened everything underneath, and yet the noise remains. Could this be related to a loose componant inside the torque tube? I'm getting tired of kids chasing me down in the neighborhood thinking I'm the ice cream man! supereal 04-27-2011 @ 10:38 AM reply profile send p.m. Senior Posts: 6819 Joined: Oct 2009 Does the sound come only when the truck is moving? Does it increase as speed goes up? It it louder at low speeds? This will help isolate the problem to the drive line, if that is the cause. It is unusual to have a noise from within the torque tube itself, as there is only a roller bearing in the middle with a solid drive shaft. The u-joint could be failing, or the u-joint cover could be loose. I'd also consider that a spring or other component has come loose and dropped into a brake drum. I assume you have checked the hubcaps to be sure that a rock or other debris has not found its way in.

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