Everything I can find points to SROD...I just wanna make certain. I've google searched it but every thread I find on different sites all comes up unanswered/inconclusive..."It might possibly be an SROD" doesn't help me. "Its an RTS transmission" isn't of much help either. So could someone please help me positively ID this monster? It's the original transmission...never been out of the truck. Here are the details.

Has a Ford logo embossed in the driver's side. Seems to be all aluminum. Top-loading 3 speed w/OD. Tailcone is also used as the rear support for the transmission. Has fill plug at angle on passenger side of transmission. 1st gear is NOT a granny gear. The part numbers RF E5TR 7006 AA and C-2605524 are embossed above the Ford logo on the driver's side. Door code for truck is B. Truck was produced in May, 1987 as an 87 model. Is an F150 XL rclb 2wd with an EFI 300 I6 and this 4-speed manual.

I need to find out what transmission this is to satisfy my desire to know every detail about my truck and to know if I can safely remove the tailcone to try to repair the speedometer drive gear or if the inside of the transmission will fall apart when I pull it.

Any help would be greatly appreciated! Thanks guys/gals!

 

https://www.ford-trucks.com/forums/1...ification.html Click on the link posted by 85e in this thread, might help.

 

Thanks man, but I've been to that site about 6 times today. It just isn't giving me concrete enough ID of my transmission...

 

Did you ever find a positive ID on this transmission? I have the same one and need to know as well! Thank you!

 

Welcome to FTE.

OP last posted in 2015.

So you have a 4 speed OD trans as described above? First is not a low or granny gear, 4th is OD. Do you know if your case is aluminum or iron? Is your shifter on top of the transmission cover? Or is your shifter on a turret connected to a tube going forward? Or is your shifter bolted to the side and connected by rods to levers on the side of the trans? (iron unit only)

What else do you need to know about it?

 

Hi there, thanks for picking this up and responding. Yes I have a 1987 f150 with the 4 speed manual described. Same set of numbers on the driver side as well. No granny gear and 4th is od. The shifter comes right out of the top. Might sound silly but not sure how to tell if cast iron or aluminum, pretty sure it's iron tho. from my research I'm pretty sure it's the t18 or t19. Having some issues with shifting into 1st and 2nd gear when slowing down after being at higher speeds in 3rd and 4th. Wanted to find out what trans I had to better diagnose. Maybe I should just make a post with the issues I'm experiencing?

 

A T18 would have a granny first and no OD. A T19 would have a slightly higher first, closer gear spacing, no OD and would be found behind a 460 or diesel as OEM. Pictures and info:

https://www.novak-adapt.com/knowledg...anual/t18-t19/

If you have "3 speed" gearing 1-2-3, and 4th is over, you have the top shifting variant of the Ford "SROD" or "Single Rail Over Drive". So called as the most common version in cars uses that turret shifter with a single rail moving the shift forks. Exhaustive rundown:

Tremec T170 SMOD, SROD, TOD Transmission Specs & Ratios

Pictures and text here, just keep scrolling to see all 3.

https://www.ford-trucks.com/forums/1...eral-info.html

 

What issues are you having? You mention difficulty downshifting to 2nd and 1st.

Usually, a downshift to 2nd should be fairly easy to do. In this transmission, you have a large gap between 2nd and 3rd. Thus, it is easy to overspeed the synchos trying to downshift into 2nd at high speed. You may also have a worn synchro.

Ditto to the 2nd power downshifting to 1st. I found it almost impossible to downshift to first in:

--my '85 E150 with the iron cased, side shifted 4 speed OD trans. (your transmissions iron cased brother)

--my '65 Mustang with the all synchro "303" 3 speed.

--my '65 Mustang (same car) with a Ford "Top Loader" performance 4 speed. (the transmission on which these OD tranmissions are based)

--my '09 Toyota Tacoma with Aisin 5 speed OD.

Downshifts at any speed to first gear place a tremendous load on the first gear synchro and are difficult in many vehicles.

Rebuild kits with synchros are available for your transmission if it comes to that.

 

Thanks for the response. I'm need to a lot of this so I apologize if my description wasn't the most detailed and accurate. When I say downshifting after being at higher speeds I meant that whenslowong down in neutral for a stop light and then when I was at the speed I should be in second, I wouldn't be able to shift into 2nd so as I'm coasting still going slower I would try 1st and that wouldn't work, but 3rd would. I read in some other post maybe the clutch isn't fully disengaging or something? Not sure. It wasn't til I was at a complete stop that I could shift into first again.

 

Check your clutch from the pad on the pedal to the throwout bearing. You year truck has a tendency to flex the firewall at the clutch master. Add a little rust and time, next thing you know the firewall is cracked, and half you motion is soaked up by the flex. Thus, the pressure plate is not moved enough to free the clutch disc and it keeps spinning enough to fubar your shifts.

firewall fix

 

Awesome, read about that on another thread, will check that out tomorrrow. Thanks so much.

 

Also, to clarify, very open to the M5OD as an option because of cost and availability.