Vacuum Modulators by Rostra Transmission
Rostra Precision Controls has been manufacturing original equipment vacuum modulators since the early 1950s. What began as Skoville Manufacturing, then Century Brass, and now Rostra (purchased Allomatic production in 1982) is now one of the few companies in the world still producing a broad range of this sometimes forgotten technology.
We proudly offer over 30 part numbers for all of the popular Ford, GM and Jatco-produced vacuum controlled transmissions. We have consolidated as many original equipment part numbers as possible to keep your inventory levels low and to further simplify the ordering process. We have also made many applications adjustable to help you fine tune and put the finishing touches on your rebuild.
Vacuum Modulators Product Listing
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GM 350/400 Adjustable Dual Red
- Transtar
- 44160D
- Whatever It Takes
- 44160D
- Natpro
- TBA
- Original Equipment
- 8629953
- Industry
- 35820P
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GM 350/400 Adjustable Black and Red
- Transtar
- 44160B
- Whatever It Takes
- 44160B
- Natpro
- 44820X
- Original Equipment
- 3035519
- Industry
- 35820Y
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Ford C4/C5 Adjustable Red
- Transtar
- 26160A
- Whatever It Takes
- 26160A
- Natpro
- 26830B
- Original Equipment
- D30Z-7A377-A
- Industry
- 26832X
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Ford C4/C5 Adjustable Yellow
- Transtar
- 26160Y
- Whatever It Takes
- 26160Y
- Natpro
- 26830A
- Original Equipment
- D2AZ-7A377-A
- Industry
- 26833X
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Ford C6 Adjustable Black
- Transtar
- 36160B
- Whatever It Takes
- 36160B
- Natpro
- 36830T
- Original Equipment
- D4TZ-7A377-A
- Industry
- 36833
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Ford C6 Adjustable Purple
- Transtar
- 36160P
- Whatever It Takes
- 36160P
- Natpro
- 36830A
- Original Equipment
- D5AZ-7A377-A
- Industry
- 36833X
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Flash-O-Matic Adjustable Brown
- Transtar
- 119160
- Whatever It Takes
- 119160
- Natpro
- 19830
- Original Equipment
- 8120253, 4485807
- Industry
- 19510A
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Ford FMX Adjustable Light Green
- Transtar
- 106160
- Whatever It Takes
- 106160
- Natpro
- 6830G
- Original Equipment
- D5AZ-7A377-C
- Industry
- 16525X
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Ford C4/C5 Adjustable Green
- Transtar
- 26160G
- Whatever It Takes
- 26160G
- Natpro
- 26830C
- Original Equipment
- D5AZ-7A377-B
- Industry
- 26833S
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GM 350/400 Adjustable Red
- Transtar
- 44160R
- Whatever It Takes
- 44160R
- Natpro
- 34820R
- Original Equipment
- Various
- Industry
- 35820R
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GM 440 Adjustable Dual Red
- Transtar
- 84160R
- Whatever It Takes
- 84160R
- Natpro
- 52820C
- Original Equipment
- 8662967
- Industry
- 84820X
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GM 440 Adjustable Black and Red
- Transtar
- 84160B
- Whatever It Takes
- 84160B
- Natpro
- 52820B
- Original Equipment
- 8649099
- Industry
- 84820A
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Ford C6 Adjustable Green
- Transtar
- 84160B
- Whatever It Takes
- 84160B
- Natpro
- 52820B
- Original Equipment
- 8649099
- Industry
- 84820A
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Allison Adjustable White
- Transtar
- 111160
- Whatever It Takes
- 111160
- Natpro
- 11820HU
- Original Equipment
- 23048272
- Industry
- 11820
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Ford C3 Adjustable Green
- Transtar
- 56160B
- Whatever It Takes
- TBA
- Natpro
- 66820B
- Original Equipment
- E1SZ-7A377-A
- Industry
- 56832
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Ford A4LD Adjustable
- Transtar
- 56160E
- Whatever It Takes
- 56160E
- Natpro
- 66820C
- Original Equipment
- FOTZ-7A377-A
- Industry
- 56833
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Ford A4LD Adjustable Ext.
- Transtar
- 56160EA
- Whatever It Takes
- 56160EA
- Natpro
- 66820M
- Original Equipment
- FOTZ-7A377-A
- Industry
- 56833M
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GM 180 Fixed Blue
- Transtar
- 24160B
- Whatever It Takes
- 24160B
- Natpro
- TBA
- Original Equipment
- 5638324
- Industry
- 54525
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GM 180 Fixed Green
- Transtar
- 24160
- Whatever It Takes
- 24160
- Natpro
- TBA
- Original Equipment
- 96013028
- Industry
- 54525C
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GM 180 Adjustable Dual Blue
- Transtar
- 24160E
- Whatever It Takes
- 24160E
- Natpro
- 64820A
- Original Equipment
- 96013169
- Industry
- 53525A
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GM 180 Adjustable Dual Green
- Transtar
- 24160C
- Whatever It Takes
- 24160C
- Natpro
- 64820B
- Original Equipment
- 96040096
- Industry
- 54525B
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GM 180 Adjustable Purple
- Transtar
- 24160G
- Whatever It Takes
- 24160G
- Natpro
- 64820C
- Original Equipment
- 96013839
- Industry
- 54525D
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Ford C4/C5 Adjustable White
- Transtar
- 26160W
- Whatever It Takes
- 26160W
- Natpro
- 26830D
- Original Equipment
- E2TZ-7A377-A
- Industry
- 26833W
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Jatco/Mazda Adjustable
- Transtar
- 13160
- Whatever It Takes
- 13160
- Natpro
- 65820C
- Original Equipment
- 31931-X0109
- Industry
- 66830X
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Powerglide Adjustable Red
- Transtar
- 114160
- Whatever It Takes
- 103160
- Natpro
- 11820A
- Original Equipment
- 5638209
- Industry
- 28738X
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Jatco/Mazda Adjustable
- Transtar
- 53160A
- Whatever It Takes
- 53160A
- Natpro
- 65820E
- Original Equipment
- BV04-19-823A
- Industry
- 66830
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Jatco/Mazda Adjustable
- Transtar
- 13160A
- Whatever It Takes
- 13160A
- Natpro
- 65820D
- Original Equipment
- 31931-X0111
- Industry
- 66830A
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Ford FMX Adjustable Blue
- Transtar
- 206160
- Whatever It Takes
- 146160
- Natpro
- 6830B
- Original Equipment
- C1AZ-7A377-A
- Industry
- 119952A
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Ford FMX Adjustable White
- Transtar
- 26160
- Whatever It Takes
- 26160
- Natpro
- 26830
- Original Equipment
- C4AZ-7A377-B
- Industry
- 26830
We appreciate and welcome all new opportunities! Rostra Precision Controls is capable of designing and manufacturing many different types of solenoids. If you have a specialized need or a recommendation for a new product, please contact us using the form below to discuss your specific needs with one of our engineers.