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DURATEC Performance (2003-2007) The place to chat about any Duratec 23, 23E, and 20 engine performance, tuning and exhaust related upgrades.

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Old 05-21-2019, 11:16 PM   #11
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Need to look at all bushings not changed too, the ones by the front input and converter often wear enough to seem all right but leak when put together and enough to affect line pressure. I'm always leery of the needle bearing thrusts too as they look brand new even years old and they come apart disastrously with no warning to tear up stuff bad since the needles are so hard. Beyond that the bushings keep all parts in perfect perpendicularity to keep them in line and no lean and why the end cover begins to wear, the rotating weight loosens up the bushings then parts begin to lean out of square to make trans last 3 years instead of the 10 it could have simply with tight bushings to hold all square. The clutch packs need to be within all limits and I set them to the tight side to lock in performance characteristics that get lost when the clutch packs can argue with each other over shift overlap timings when they get loose at the clutches. The band servo piston needs to be brand new, don't use a used one. Check the OWCs for instant locking and zero slip the other way. The ends of all major shafts preload into the cases on both ends and if any shafts get changed the preload has to reset and it should even be rechecked on same parts as the preload may have dropped off. Really needed at the 3 gear final geartrain to differential and diff (both ends) itself to avoid gear whine. You will be faced with what to do with the output hub that gets left in trans case, it has a very special setup procedure requiring special tooling. Most rebuilders leave it alone, they are afraid of screwing it up.
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Old 05-22-2019, 09:22 PM   #12
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Definitely. I am just collecting a good chunk of the parts. The assembly is going to be done by a professional. May drop it myself and take it up there bit I want them to install it too so I will probly just pay the 200 extra drop fee.
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Old 05-23-2019, 04:35 PM   #13
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More parts...getting crazy over here.
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Old 05-23-2019, 07:32 PM   #14
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You should be warned that most 'professionals' will NOT check all those clearances, the norm is for them to simply slap all parts together. Take 'rebuilt' converters, often not rebuilt at all and not even flushed clean, even though they claim to. I have bought and sent back converter with broken pieces of thrust washer coming out when I flushed it myself. Dacco Converter, they ship all over the US.

I have personally watched assembly going on at the largest shop here in Dallas, the word professional does not fit anywhere there. Now it is TranStar, largest ATX parts distributor in the US.
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Old 05-23-2019, 08:30 PM   #15
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Hoping he is good. I am giving a to do list with my car for the quote. The shop is ATRA members at least. Guess seems good. Great reviews from the local people.
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Old 05-23-2019, 08:36 PM   #16
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Now this is interesting.
https://www.rockauto.com/en/moreinfo...176&cc=1433084

Rock Auto shows a med/high stall speed converter from TransMaxx..... Hmmmm
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Old 05-27-2019, 12:19 PM   #17
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So I picked up SVT rear calipers for 20 bux yesterday. No hubs and mounting bracket though... O well off to the salvage yard soon I guess.

If anybody wants a OEM header and throttle body from an 03 SVT let me know. I would post in the for sale section but it won't let me start a thread there.
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Old 07-02-2019, 04:51 PM   #18
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So we have everything planned out and started. Ended up with a DA54 converter with a medium/high stall speed. Alto red clutches and steels, billet actuators, reman valve body with spring upgrades. Gonna cost me $1600 total with all the parts but I should have a healthy 4f27e I can swap into my next vehicle which will be a zx5 with a built 2.3 Duratec. I want to figure out what machining was done to get the LSD in there like Lenn and Performance Automatic used to pull off. Looks to me like it's a machining and case swap type conversion. Tried to search for tech specs but can't find them. If anybody has a line on a used valve body with trans take add on. PM me.
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