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| '61 sweptline 3 speed https://slantsix.org/forum/viewtopic.php?t=63736 |
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| Author: | Tim Keith [ Sun Jun 16, 2019 6:02 pm ] |
| Post subject: | '61 sweptline 3 speed |
My '61 D100 has a three speed manual transmission. Anyone know what gearbox it is? |
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| Author: | Greg Ondayko [ Mon Jun 17, 2019 5:20 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
We can probably Id it if you post a picture of it. A few clues to help us.. Does it have a synchronized 1st gear? Greg |
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| Author: | Tim Keith [ Mon Jun 17, 2019 7:39 pm ] |
| Post subject: | Re: '61 sweptline 3 speed |
Truck isn't running. I'm hoping to switch to a stronger transmission. I figure there isn't much that will bolt to the cast iron bell housing. The transmission is a top loader and it has an iron case. I'll get a photo. I've read that a Borg Warner T-85 three speed was a heavy duty option but this doesn't look very strong. |
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| Author: | sixinthehead [ Tue Jun 18, 2019 4:11 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
I think the T-85 is a side-loader, so my guess is a 745. |
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| Author: | Greg Ondayko [ Tue Jun 18, 2019 5:33 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
Another clue can be the back.. does it have a slip yoke or trunion or does it have a u joint flange on the output? Greg |
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| Author: | Tim Keith [ Tue Jun 18, 2019 6:48 pm ] |
| Post subject: | Re: '61 sweptline 3 speed |
Transmission has a front u-joint like this : https://www.61-71dodgesweptlineparts.co ... on-yoke-2/ |
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| Author: | Jase [ Thu Jun 20, 2019 6:15 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
NO idea what a 3 speed top loader would be... Assuming it is a Sweptline hydraulic clutch bell housing, Any New Process 420, 435, 445 or 540 should fit. Pre 1968 clutches were 8 or 10 coarse splined, later than that and the clutch was a fine spline 23 or something. Older style coarse splined clutches will likely need to be re-built, as modern day parts suppliers only have the later fine splined unit regardless of what they claim. |
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| Author: | Tim Keith [ Thu Jun 20, 2019 9:47 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
Its hydro clutch on cast iron bell housing. The speedometer cable connects to the top of the transmission cover. A NP435 would be a reasonable choice. I'd like the NP445 (4350) but these can be hard to find and some parts are no longer available - if I find one in good shape that's what I'd like to use. I also have three aluminum case NP833 O/Ds from D150s, a cast iron A-body 833, an AX15 and a Toyota W58. Its good to know the b/h can accept an easy to find NP435 - not wanting the granny gear but its much stronger than the 3 speed. |
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| Author: | Jase [ Thu Jun 20, 2019 11:21 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
I have a NP 445 sitting here for my M37 conversion, and would really like to use it, but creating a stub shaft to connect with the Transfer case has been more difficult than I imagined... IT IS an ideal road transmission.. and I am coming under a time crunch that may force the quick answer of a NP 435 going into it's place in the truck. LMK if you are interested.. Also I have read that some NP 435's have a close ratio gear spacing which takes place of the granny gear, and the long drop in RPM's between 3rd and 4th. Never seen one, but I am still new to this game, and learning my way around. |
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| Author: | Tim Keith [ Thu Jun 20, 2019 4:45 pm ] |
| Post subject: | Re: '61 sweptline 3 speed |
The transmission that I have is probably not the A745 - those have a hump on the top cover. Doesn't matter too much because I want something better. I believe the door tags on sweptline trucks identify the transmission type. |
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| Author: | THOR [ Thu Jun 27, 2019 10:11 am ] |
| Post subject: | Re: '61 sweptline 3 speed |
It could also be an A903, which if I recall has a synchronized 1st gear. ~THOR~ |
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| Author: | Tim Keith [ Fri Jul 26, 2019 11:34 pm ] |
| Post subject: | Re: '61 sweptline 3 speed |
I don't think anyone has swapped an AX-15 to a truck. You can exchange the internals of a R-154 into an AX-15 if you have them. I think the AX15 would work well with a truck. The oem version was rated at 280 lb ft torque capacity, good for a slant six. Aisin produces a replacement AX15 which is stronger - I don't know what parts are upgraded, but parts are available. I have the slant six to small block adapter but I don't think I'd use it as it spaces the transmission further from the block, requiring a longer input shaft. https://www.driftmotion.com/New-R154-Tr ... dm3513.htm |
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