SM465 Speedo gear HELP!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**tkeduk8r** · 03-22-2008, 12:34 AM

Can someone who has a truck with an SM465 and 3.73 gears tell me what speedo driven gear you have???? I currently have a "J" stamped on mine (it is steel not plastic) and there was a 1.25 reduction unit between the speedocable and the driven gear. The "J" driven gear has 19 teeth. The donor trans came out of a 82 C10 with a 2.73 ring and pinion. I have a trans guy that has all the gears in the world but I cant seem to find the right combo for this swap... This combo will be used with 31x10.5 tires. I also have never seen a steel driven gear either.... Here are some pix of what I have... the numbers stamped on the Stewart Warner reduction box that arent legible are "666E C4" and beneath that are "1.2500 BT"... any help is GREATLY appreciated!!!!
--Mike

**tkeduk8r** · 03-22-2008, 05:32 AM

anyone????
--Mike

**tkeduk8r** · 03-22-2008, 10:54 PM

ttt... in the hopes someone out there is not getting the 8 inches of snow we are right now

...
--Mike

ed2552 · 03-22-2008, 11:14 PM

it rle sucks doesn't it? yesterday i was hauling stuff home from an auction in a short sleeved shirt, and now there is 4 in of snow on the ground

**tkeduk8r** · 03-23-2008, 04:04 PM

ttt

dan42 · 03-23-2008, 11:59 PM

I have an SM465 with 31" tall tires on my '67 with 3.73's and I plugged the speedo cable directly into the tranny, and it seems to read around 10-15% slow. I will address it when I seriously go through the truck, but for now, it's O.K. by me.

**tkeduk8r** · 03-24-2008, 12:52 AM

you wouldnt happen to be able to pull your driven gear out and check the letter stamped on your driven gear for me would you???? It would be a HUGE help.... thanks in advance!!!
--Mike

03-22-2008, 12:34 AM	#1
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	SM465 Speedo gear HELP!!!! Can someone who has a truck with an SM465 and 3.73 gears tell me what speedo driven gear you have???? I currently have a "J" stamped on mine (it is steel not plastic) and there was a 1.25 reduction unit between the speedocable and the driven gear. The "J" driven gear has 19 teeth. The donor trans came out of a 82 C10 with a 2.73 ring and pinion. I have a trans guy that has all the gears in the world but I cant seem to find the right combo for this swap... This combo will be used with 31x10.5 tires. I also have never seen a steel driven gear either.... Here are some pix of what I have... the numbers stamped on the Stewart Warner reduction box that arent legible are "666E C4" and beneath that are "1.2500 BT"... any help is GREATLY appreciated!!!! --Mike Attached Images __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

03-22-2008, 05:32 AM	#2
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: SM465 Speedo gear HELP!!!! anyone???? --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

03-22-2008, 10:54 PM	#3
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: SM465 Speedo gear HELP!!!! ttt... in the hopes someone out there is not getting the 8 inches of snow we are right now... --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

03-22-2008, 11:14 PM	#4
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: SM465 Speedo gear HELP!!!! it rle sucks doesn't it? yesterday i was hauling stuff home from an auction in a short sleeved shirt, and now there is 4 in of snow on the ground __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

03-23-2008, 04:04 PM	#5
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: SM465 Speedo gear HELP!!!! ttt __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

03-23-2008, 11:59 PM	#6
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Re: SM465 Speedo gear HELP!!!! I have an SM465 with 31" tall tires on my '67 with 3.73's and I plugged the speedo cable directly into the tranny, and it seems to read around 10-15% slow. I will address it when I seriously go through the truck, but for now, it's O.K. by me. __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

03-24-2008, 12:52 AM	#7
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: SM465 Speedo gear HELP!!!! you wouldnt happen to be able to pull your driven gear out and check the letter stamped on your driven gear for me would you???? It would be a HUGE help.... thanks in advance!!! --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's



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