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Hello all first time poster here great website with tons of info!
I have been slowing working on my f100 that i bought about a year ago found a donor truck just finished converting to disc brakes working on replacing all the brake lines now.
In the middle of that I have been working on finding a transmission for my 240 engine, everywhere I read said almost any transmission from a V8 or a 300 around that era will fit.
I found a 4 speed tranny with granny gear. It came off of a 1972 f-250 with a 360 engine I spent most of the evening trying to get it to go in my bell housing assembly. I had my dad, and a friend of mine helping me, we could not get it in... There were times we could get some of the teeth to fit in bit but we couldnt get it to go in any further. It sticks out about 1.5in we wiggled changed angles did everything we could think of to try and get it to mate against the bell housing... Am I an idiot? will this transmission not fit my 240/300 bell housing?
Any advice would be AMAZING! thanks in advance!!!
Andy
In this photo I realize the angle is off a bit but it was just a representation to show how close we can get it.
Is the clutch disc still centered? If not, you will not get the transmission installed.
I do believe so I went back to the junkyard and the owner there is very knowledgeable he swears to me that should fit in no problem and told me to take the bell housing off just to make sure it fits on and do it that way so I am about to start doing that I guess.
I'd do some research on the pilot bearing inner diameter and make sure it fits the shaft.
Once you've verified that, get a clutch alignment tool, loosen your pressure plate bolts, install alignment tool until it's fully seated, and re-torque your PP bolts. As one previous poster said, if it's not centered, it ain't going in.
by Rob Wagner Three-speed manual transmissions are the best candidates to bolt to the 300-cubic-inch in-line six-cylinder engine in a Ford F-Series pickup truck. The Tremec T5 five-speed manual serves as a good upgrade for the 300.
T85 to T89 Manuals
The T85, T86, T87 and T89 three-speed manual transmissions can fit behind the 300 straight-six. Depending on the origin of the transmission, most will fit directly onto the 300 with few modifications. However, three-speeds from non-Ford vehicles or Ford automobiles may require modifications, according to Hemmings. Ford primarily equipped its Ford F-Series trucks with the 300.
Construction and Gear Ratios
The cast-iron T85 with a nine-bolt side cover bolts onto 1965 to 1971 Ford trucks with the 300. The T86 matches 300s in 1961 to 1964 trucks. The T87 transmitted power to the wheels from the 300 engine in all trucks through 1975. The T89 fits all Ford trucks through 1971. The gear ratios are 2.53-to-1 or 2.49-to-1 for first gear, 1.59-to-1 for second and 1.00-to-1 for third. The transmission shafts from cars must be exchanged for longer versions (half-inch) on trucks. The T-85-N matches the 300 without modifications.
T5
The Tremec T5 five-speed is adaptable to the 300 with modifications. Transmission fabrication shops can manufacture adapters for the 300's 8.5-inch clutch and flywheel. The gear ratios are 2.95-to-1, 1.94-to-1, 1.34-to-1, 1.00-to-1 and 0.63-to-1.
The only real difference in input shafts for transmissions is Big block and Small block. The pilot length is longer on a small block.
You can put a small block transmission in a big block bellhousing, but the Big block input is too short to reach the pilot bearing in a small block bellhousing.
Everything else is the same. The engine family doesn't really matter.
With the bellhousing back on, measure from the outside face down to the pilot bushing in the rear of the crank. Then compare to your transmission from face of transmission down to the edge of splines were pilot steps down. Transmission should be like 1/8" shorter give/take.
If everything measures out okay, then you just need to make sure your clutch disc is still centered. Just looking in the center of disc you should see the pilot bushing hole. If not, then it's out of location. Loosen the bolts and use the dowel from the parts store or just use your fingers and align it the best you can. If you get it close, once you have the transmission into the disc, just push the linkage enough to release the disc and wiggle the transmission down until it seats with bellhousing. DO NOT USE bolts to pull the transmission in. You will break the ears off the transmission!!!!!
Well, you can't run that transmission. The pilot bearing will not be supporting the input shaft. It will work, but not for long before the transmission input bearing goes away. That along with the clutch disc will not stay centered and at higher RPM you will notice a vibration from it being off center while it spins.
Well, you can't run that transmission. The pilot bearing will not be supporting the input shaft. It will work, but not for long before the transmission input bearing goes away. That along with the clutch disc will not stay centered and at higher RPM you will notice a vibration from it being off center while it spins.
So I guess the solution is to get a input shaft from a small block motor?
I don't see the issue, I have swapped 300 to 360 engines in high boys and the only thing that changes is the bell housing. The transmission bolts up just fine. Just put the trans in 4th gear and rotate the output shaft while sliding it in.
You can put a small block trans to a big block bell, that's fine. It's the other way around that it won't work well. He agreed it has the wrong input shaft.
Yes, he couldn't get it assembled, but it's a moot point since it won't be right.
You can swap the inputs, but you have to completely dismantle the transmission to do it. Someone well versed would do it quickly. If you don't what you are doing, you can make yourself a real mess. Better to find another transmission.
Can anyone tell me what to call this type of transmission? So I can name it properly when/if I post for sale? I may keep it and work on it later to make it work but still would like to know what exactly it is.
I usee the junkyard website to find the transmission kind of upsetting that it said it would work for my model but guess that's the gamble you get from junkyard
02-25-2019, 09:37 PM
