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04-12-2020, 07:49 PM | #1 |
Junior Member
Join Date: Aug 2019
Posts: 3
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48-52 4 speed transmission
Was the 4 speed spur gear (non-synchro) transmission used in the lighter trucks the same as that used in the 48-52 F5 and F6?
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04-12-2020, 08:22 PM | #2 |
Senior Member
Join Date: May 2010
Location: upstate SC
Posts: 2,963
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Re: 48-52 4 speed transmission
looks the same to me-I have changed several out for syncro 3 speeds
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04-12-2020, 08:29 PM | #3 |
Senior Member
Join Date: Dec 2015
Location: Marana, AZ.
Posts: 414
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Re: 48-52 4 speed transmission
My 48 F2 and 52 F3 both had the non synchro T9 (crash box)
I swapped in a synchronized T98 from a 50 F6. It was original to the F6 I removed it from. |
04-12-2020, 09:49 PM | #4 |
Senior Member
Join Date: Feb 2011
Posts: 253
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Re: 48-52 4 speed transmission
Case, shifter, and most of the guts, yes. Rear mounts are different for applications: there are short mounts with no hand brake, medium height mounts for no hand brake, medium height mounts with handbrake, and tall height mounts with handbrake. And the main shaft differs between underdash brake and band type brake (handbrake). So interchangeabilkity between f1 and f6 is possible, depending on how much of an appetite one has for swapping out piece parts.
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04-12-2020, 09:57 PM | #5 |
Senior Member
Join Date: Feb 2011
Posts: 253
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Re: 48-52 4 speed transmission
The depth of the trans crossmember dictates the height of the rear transmount. Also, all the 48 to 52 F1s had cable operated underdash ebrake; same ebrake setup also used 48-50 F2 and F3. 51 and 52 F2 and F3 swapped to the band style ebrake in use since 48 on the F4 through F6 trucks. F1 4 speed driveshaft is unique to F1 only. 48 to 50 F2 and F3 drive shafts are longer than the corresponding 51 and 52 drive shafts due to ebrake change. Hope this helps.
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04-13-2020, 11:29 AM | #6 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,425
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Re: 48-52 4 speed transmission
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